1 /* Support routines for manipulating internal types for GDB.
3 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include "expression.h"
33 #include "complaints.h"
37 #include "cp-support.h"
39 #include "dwarf2/loc.h"
41 #include "floatformat.h"
44 /* Initialize BADNESS constants. */
46 const struct rank LENGTH_MISMATCH_BADNESS
= {100,0};
48 const struct rank TOO_FEW_PARAMS_BADNESS
= {100,0};
49 const struct rank INCOMPATIBLE_TYPE_BADNESS
= {100,0};
51 const struct rank EXACT_MATCH_BADNESS
= {0,0};
53 const struct rank INTEGER_PROMOTION_BADNESS
= {1,0};
54 const struct rank FLOAT_PROMOTION_BADNESS
= {1,0};
55 const struct rank BASE_PTR_CONVERSION_BADNESS
= {1,0};
56 const struct rank CV_CONVERSION_BADNESS
= {1, 0};
57 const struct rank INTEGER_CONVERSION_BADNESS
= {2,0};
58 const struct rank FLOAT_CONVERSION_BADNESS
= {2,0};
59 const struct rank INT_FLOAT_CONVERSION_BADNESS
= {2,0};
60 const struct rank VOID_PTR_CONVERSION_BADNESS
= {2,0};
61 const struct rank BOOL_CONVERSION_BADNESS
= {3,0};
62 const struct rank BASE_CONVERSION_BADNESS
= {2,0};
63 const struct rank REFERENCE_CONVERSION_BADNESS
= {2,0};
64 const struct rank REFERENCE_SEE_THROUGH_BADNESS
= {0,1};
65 const struct rank NULL_POINTER_CONVERSION_BADNESS
= {2,0};
66 const struct rank NS_POINTER_CONVERSION_BADNESS
= {10,0};
67 const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS
= {3,0};
69 /* Floatformat pairs. */
70 const struct floatformat
*floatformats_ieee_half
[BFD_ENDIAN_UNKNOWN
] = {
71 &floatformat_ieee_half_big
,
72 &floatformat_ieee_half_little
74 const struct floatformat
*floatformats_ieee_single
[BFD_ENDIAN_UNKNOWN
] = {
75 &floatformat_ieee_single_big
,
76 &floatformat_ieee_single_little
78 const struct floatformat
*floatformats_ieee_double
[BFD_ENDIAN_UNKNOWN
] = {
79 &floatformat_ieee_double_big
,
80 &floatformat_ieee_double_little
82 const struct floatformat
*floatformats_ieee_double_littlebyte_bigword
[BFD_ENDIAN_UNKNOWN
] = {
83 &floatformat_ieee_double_big
,
84 &floatformat_ieee_double_littlebyte_bigword
86 const struct floatformat
*floatformats_i387_ext
[BFD_ENDIAN_UNKNOWN
] = {
87 &floatformat_i387_ext
,
90 const struct floatformat
*floatformats_m68881_ext
[BFD_ENDIAN_UNKNOWN
] = {
91 &floatformat_m68881_ext
,
92 &floatformat_m68881_ext
94 const struct floatformat
*floatformats_arm_ext
[BFD_ENDIAN_UNKNOWN
] = {
95 &floatformat_arm_ext_big
,
96 &floatformat_arm_ext_littlebyte_bigword
98 const struct floatformat
*floatformats_ia64_spill
[BFD_ENDIAN_UNKNOWN
] = {
99 &floatformat_ia64_spill_big
,
100 &floatformat_ia64_spill_little
102 const struct floatformat
*floatformats_ia64_quad
[BFD_ENDIAN_UNKNOWN
] = {
103 &floatformat_ia64_quad_big
,
104 &floatformat_ia64_quad_little
106 const struct floatformat
*floatformats_vax_f
[BFD_ENDIAN_UNKNOWN
] = {
110 const struct floatformat
*floatformats_vax_d
[BFD_ENDIAN_UNKNOWN
] = {
114 const struct floatformat
*floatformats_ibm_long_double
[BFD_ENDIAN_UNKNOWN
] = {
115 &floatformat_ibm_long_double_big
,
116 &floatformat_ibm_long_double_little
119 /* Should opaque types be resolved? */
121 static bool opaque_type_resolution
= true;
123 /* See gdbtypes.h. */
125 unsigned int overload_debug
= 0;
127 /* A flag to enable strict type checking. */
129 static bool strict_type_checking
= true;
131 /* A function to show whether opaque types are resolved. */
134 show_opaque_type_resolution (struct ui_file
*file
, int from_tty
,
135 struct cmd_list_element
*c
,
138 fprintf_filtered (file
, _("Resolution of opaque struct/class/union types "
139 "(if set before loading symbols) is %s.\n"),
143 /* A function to show whether C++ overload debugging is enabled. */
146 show_overload_debug (struct ui_file
*file
, int from_tty
,
147 struct cmd_list_element
*c
, const char *value
)
149 fprintf_filtered (file
, _("Debugging of C++ overloading is %s.\n"),
153 /* A function to show the status of strict type checking. */
156 show_strict_type_checking (struct ui_file
*file
, int from_tty
,
157 struct cmd_list_element
*c
, const char *value
)
159 fprintf_filtered (file
, _("Strict type checking is %s.\n"), value
);
163 /* Allocate a new OBJFILE-associated type structure and fill it
164 with some defaults. Space for the type structure is allocated
165 on the objfile's objfile_obstack. */
168 alloc_type (struct objfile
*objfile
)
172 gdb_assert (objfile
!= NULL
);
174 /* Alloc the structure and start off with all fields zeroed. */
175 type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct type
);
176 TYPE_MAIN_TYPE (type
) = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
178 OBJSTAT (objfile
, n_types
++);
180 TYPE_OBJFILE_OWNED (type
) = 1;
181 TYPE_OWNER (type
).objfile
= objfile
;
183 /* Initialize the fields that might not be zero. */
185 TYPE_CODE (type
) = TYPE_CODE_UNDEF
;
186 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
191 /* Allocate a new GDBARCH-associated type structure and fill it
192 with some defaults. Space for the type structure is allocated
193 on the obstack associated with GDBARCH. */
196 alloc_type_arch (struct gdbarch
*gdbarch
)
200 gdb_assert (gdbarch
!= NULL
);
202 /* Alloc the structure and start off with all fields zeroed. */
204 type
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct type
);
205 TYPE_MAIN_TYPE (type
) = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct main_type
);
207 TYPE_OBJFILE_OWNED (type
) = 0;
208 TYPE_OWNER (type
).gdbarch
= gdbarch
;
210 /* Initialize the fields that might not be zero. */
212 TYPE_CODE (type
) = TYPE_CODE_UNDEF
;
213 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
218 /* If TYPE is objfile-associated, allocate a new type structure
219 associated with the same objfile. If TYPE is gdbarch-associated,
220 allocate a new type structure associated with the same gdbarch. */
223 alloc_type_copy (const struct type
*type
)
225 if (TYPE_OBJFILE_OWNED (type
))
226 return alloc_type (TYPE_OWNER (type
).objfile
);
228 return alloc_type_arch (TYPE_OWNER (type
).gdbarch
);
231 /* If TYPE is gdbarch-associated, return that architecture.
232 If TYPE is objfile-associated, return that objfile's architecture. */
235 get_type_arch (const struct type
*type
)
237 struct gdbarch
*arch
;
239 if (TYPE_OBJFILE_OWNED (type
))
240 arch
= TYPE_OWNER (type
).objfile
->arch ();
242 arch
= TYPE_OWNER (type
).gdbarch
;
244 /* The ARCH can be NULL if TYPE is associated with neither an objfile nor
245 a gdbarch, however, this is very rare, and even then, in most cases
246 that get_type_arch is called, we assume that a non-NULL value is
248 gdb_assert (arch
!= NULL
);
252 /* See gdbtypes.h. */
255 get_target_type (struct type
*type
)
259 type
= TYPE_TARGET_TYPE (type
);
261 type
= check_typedef (type
);
267 /* See gdbtypes.h. */
270 type_length_units (struct type
*type
)
272 struct gdbarch
*arch
= get_type_arch (type
);
273 int unit_size
= gdbarch_addressable_memory_unit_size (arch
);
275 return TYPE_LENGTH (type
) / unit_size
;
278 /* Alloc a new type instance structure, fill it with some defaults,
279 and point it at OLDTYPE. Allocate the new type instance from the
280 same place as OLDTYPE. */
283 alloc_type_instance (struct type
*oldtype
)
287 /* Allocate the structure. */
289 if (! TYPE_OBJFILE_OWNED (oldtype
))
290 type
= GDBARCH_OBSTACK_ZALLOC (get_type_arch (oldtype
), struct type
);
292 type
= OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype
)->objfile_obstack
,
295 TYPE_MAIN_TYPE (type
) = TYPE_MAIN_TYPE (oldtype
);
297 TYPE_CHAIN (type
) = type
; /* Chain back to itself for now. */
302 /* Clear all remnants of the previous type at TYPE, in preparation for
303 replacing it with something else. Preserve owner information. */
306 smash_type (struct type
*type
)
308 int objfile_owned
= TYPE_OBJFILE_OWNED (type
);
309 union type_owner owner
= TYPE_OWNER (type
);
311 memset (TYPE_MAIN_TYPE (type
), 0, sizeof (struct main_type
));
313 /* Restore owner information. */
314 TYPE_OBJFILE_OWNED (type
) = objfile_owned
;
315 TYPE_OWNER (type
) = owner
;
317 /* For now, delete the rings. */
318 TYPE_CHAIN (type
) = type
;
320 /* For now, leave the pointer/reference types alone. */
323 /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points
324 to a pointer to memory where the pointer type should be stored.
325 If *TYPEPTR is zero, update it to point to the pointer type we return.
326 We allocate new memory if needed. */
329 make_pointer_type (struct type
*type
, struct type
**typeptr
)
331 struct type
*ntype
; /* New type */
334 ntype
= TYPE_POINTER_TYPE (type
);
339 return ntype
; /* Don't care about alloc,
340 and have new type. */
341 else if (*typeptr
== 0)
343 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
348 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
350 ntype
= alloc_type_copy (type
);
354 else /* We have storage, but need to reset it. */
357 chain
= TYPE_CHAIN (ntype
);
359 TYPE_CHAIN (ntype
) = chain
;
362 TYPE_TARGET_TYPE (ntype
) = type
;
363 TYPE_POINTER_TYPE (type
) = ntype
;
365 /* FIXME! Assumes the machine has only one representation for pointers! */
368 = gdbarch_ptr_bit (get_type_arch (type
)) / TARGET_CHAR_BIT
;
369 TYPE_CODE (ntype
) = TYPE_CODE_PTR
;
371 /* Mark pointers as unsigned. The target converts between pointers
372 and addresses (CORE_ADDRs) using gdbarch_pointer_to_address and
373 gdbarch_address_to_pointer. */
374 TYPE_UNSIGNED (ntype
) = 1;
376 /* Update the length of all the other variants of this type. */
377 chain
= TYPE_CHAIN (ntype
);
378 while (chain
!= ntype
)
380 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
381 chain
= TYPE_CHAIN (chain
);
387 /* Given a type TYPE, return a type of pointers to that type.
388 May need to construct such a type if this is the first use. */
391 lookup_pointer_type (struct type
*type
)
393 return make_pointer_type (type
, (struct type
**) 0);
396 /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
397 points to a pointer to memory where the reference type should be
398 stored. If *TYPEPTR is zero, update it to point to the reference
399 type we return. We allocate new memory if needed. REFCODE denotes
400 the kind of reference type to lookup (lvalue or rvalue reference). */
403 make_reference_type (struct type
*type
, struct type
**typeptr
,
404 enum type_code refcode
)
406 struct type
*ntype
; /* New type */
407 struct type
**reftype
;
410 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
412 ntype
= (refcode
== TYPE_CODE_REF
? TYPE_REFERENCE_TYPE (type
)
413 : TYPE_RVALUE_REFERENCE_TYPE (type
));
418 return ntype
; /* Don't care about alloc,
419 and have new type. */
420 else if (*typeptr
== 0)
422 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
427 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
429 ntype
= alloc_type_copy (type
);
433 else /* We have storage, but need to reset it. */
436 chain
= TYPE_CHAIN (ntype
);
438 TYPE_CHAIN (ntype
) = chain
;
441 TYPE_TARGET_TYPE (ntype
) = type
;
442 reftype
= (refcode
== TYPE_CODE_REF
? &TYPE_REFERENCE_TYPE (type
)
443 : &TYPE_RVALUE_REFERENCE_TYPE (type
));
447 /* FIXME! Assume the machine has only one representation for
448 references, and that it matches the (only) representation for
451 TYPE_LENGTH (ntype
) =
452 gdbarch_ptr_bit (get_type_arch (type
)) / TARGET_CHAR_BIT
;
453 TYPE_CODE (ntype
) = refcode
;
457 /* Update the length of all the other variants of this type. */
458 chain
= TYPE_CHAIN (ntype
);
459 while (chain
!= ntype
)
461 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
462 chain
= TYPE_CHAIN (chain
);
468 /* Same as above, but caller doesn't care about memory allocation
472 lookup_reference_type (struct type
*type
, enum type_code refcode
)
474 return make_reference_type (type
, (struct type
**) 0, refcode
);
477 /* Lookup the lvalue reference type for the type TYPE. */
480 lookup_lvalue_reference_type (struct type
*type
)
482 return lookup_reference_type (type
, TYPE_CODE_REF
);
485 /* Lookup the rvalue reference type for the type TYPE. */
488 lookup_rvalue_reference_type (struct type
*type
)
490 return lookup_reference_type (type
, TYPE_CODE_RVALUE_REF
);
493 /* Lookup a function type that returns type TYPE. TYPEPTR, if
494 nonzero, points to a pointer to memory where the function type
495 should be stored. If *TYPEPTR is zero, update it to point to the
496 function type we return. We allocate new memory if needed. */
499 make_function_type (struct type
*type
, struct type
**typeptr
)
501 struct type
*ntype
; /* New type */
503 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
505 ntype
= alloc_type_copy (type
);
509 else /* We have storage, but need to reset it. */
515 TYPE_TARGET_TYPE (ntype
) = type
;
517 TYPE_LENGTH (ntype
) = 1;
518 TYPE_CODE (ntype
) = TYPE_CODE_FUNC
;
520 INIT_FUNC_SPECIFIC (ntype
);
525 /* Given a type TYPE, return a type of functions that return that type.
526 May need to construct such a type if this is the first use. */
529 lookup_function_type (struct type
*type
)
531 return make_function_type (type
, (struct type
**) 0);
534 /* Given a type TYPE and argument types, return the appropriate
535 function type. If the final type in PARAM_TYPES is NULL, make a
539 lookup_function_type_with_arguments (struct type
*type
,
541 struct type
**param_types
)
543 struct type
*fn
= make_function_type (type
, (struct type
**) 0);
548 if (param_types
[nparams
- 1] == NULL
)
551 TYPE_VARARGS (fn
) = 1;
553 else if (TYPE_CODE (check_typedef (param_types
[nparams
- 1]))
557 /* Caller should have ensured this. */
558 gdb_assert (nparams
== 0);
559 TYPE_PROTOTYPED (fn
) = 1;
562 TYPE_PROTOTYPED (fn
) = 1;
565 TYPE_NFIELDS (fn
) = nparams
;
567 = (struct field
*) TYPE_ZALLOC (fn
, nparams
* sizeof (struct field
));
568 for (i
= 0; i
< nparams
; ++i
)
569 TYPE_FIELD_TYPE (fn
, i
) = param_types
[i
];
574 /* Identify address space identifier by name --
575 return the integer flag defined in gdbtypes.h. */
578 address_space_name_to_int (struct gdbarch
*gdbarch
,
579 const char *space_identifier
)
583 /* Check for known address space delimiters. */
584 if (!strcmp (space_identifier
, "code"))
585 return TYPE_INSTANCE_FLAG_CODE_SPACE
;
586 else if (!strcmp (space_identifier
, "data"))
587 return TYPE_INSTANCE_FLAG_DATA_SPACE
;
588 else if (gdbarch_address_class_name_to_type_flags_p (gdbarch
)
589 && gdbarch_address_class_name_to_type_flags (gdbarch
,
594 error (_("Unknown address space specifier: \"%s\""), space_identifier
);
597 /* Identify address space identifier by integer flag as defined in
598 gdbtypes.h -- return the string version of the adress space name. */
601 address_space_int_to_name (struct gdbarch
*gdbarch
, int space_flag
)
603 if (space_flag
& TYPE_INSTANCE_FLAG_CODE_SPACE
)
605 else if (space_flag
& TYPE_INSTANCE_FLAG_DATA_SPACE
)
607 else if ((space_flag
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
608 && gdbarch_address_class_type_flags_to_name_p (gdbarch
))
609 return gdbarch_address_class_type_flags_to_name (gdbarch
, space_flag
);
614 /* Create a new type with instance flags NEW_FLAGS, based on TYPE.
616 If STORAGE is non-NULL, create the new type instance there.
617 STORAGE must be in the same obstack as TYPE. */
620 make_qualified_type (struct type
*type
, int new_flags
,
621 struct type
*storage
)
628 if (TYPE_INSTANCE_FLAGS (ntype
) == new_flags
)
630 ntype
= TYPE_CHAIN (ntype
);
632 while (ntype
!= type
);
634 /* Create a new type instance. */
636 ntype
= alloc_type_instance (type
);
639 /* If STORAGE was provided, it had better be in the same objfile
640 as TYPE. Otherwise, we can't link it into TYPE's cv chain:
641 if one objfile is freed and the other kept, we'd have
642 dangling pointers. */
643 gdb_assert (TYPE_OBJFILE (type
) == TYPE_OBJFILE (storage
));
646 TYPE_MAIN_TYPE (ntype
) = TYPE_MAIN_TYPE (type
);
647 TYPE_CHAIN (ntype
) = ntype
;
650 /* Pointers or references to the original type are not relevant to
652 TYPE_POINTER_TYPE (ntype
) = (struct type
*) 0;
653 TYPE_REFERENCE_TYPE (ntype
) = (struct type
*) 0;
655 /* Chain the new qualified type to the old type. */
656 TYPE_CHAIN (ntype
) = TYPE_CHAIN (type
);
657 TYPE_CHAIN (type
) = ntype
;
659 /* Now set the instance flags and return the new type. */
660 TYPE_INSTANCE_FLAGS (ntype
) = new_flags
;
662 /* Set length of new type to that of the original type. */
663 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
668 /* Make an address-space-delimited variant of a type -- a type that
669 is identical to the one supplied except that it has an address
670 space attribute attached to it (such as "code" or "data").
672 The space attributes "code" and "data" are for Harvard
673 architectures. The address space attributes are for architectures
674 which have alternately sized pointers or pointers with alternate
678 make_type_with_address_space (struct type
*type
, int space_flag
)
680 int new_flags
= ((TYPE_INSTANCE_FLAGS (type
)
681 & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
682 | TYPE_INSTANCE_FLAG_DATA_SPACE
683 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
))
686 return make_qualified_type (type
, new_flags
, NULL
);
689 /* Make a "c-v" variant of a type -- a type that is identical to the
690 one supplied except that it may have const or volatile attributes
691 CNST is a flag for setting the const attribute
692 VOLTL is a flag for setting the volatile attribute
693 TYPE is the base type whose variant we are creating.
695 If TYPEPTR and *TYPEPTR are non-zero, then *TYPEPTR points to
696 storage to hold the new qualified type; *TYPEPTR and TYPE must be
697 in the same objfile. Otherwise, allocate fresh memory for the new
698 type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
699 new type we construct. */
702 make_cv_type (int cnst
, int voltl
,
704 struct type
**typeptr
)
706 struct type
*ntype
; /* New type */
708 int new_flags
= (TYPE_INSTANCE_FLAGS (type
)
709 & ~(TYPE_INSTANCE_FLAG_CONST
710 | TYPE_INSTANCE_FLAG_VOLATILE
));
713 new_flags
|= TYPE_INSTANCE_FLAG_CONST
;
716 new_flags
|= TYPE_INSTANCE_FLAG_VOLATILE
;
718 if (typeptr
&& *typeptr
!= NULL
)
720 /* TYPE and *TYPEPTR must be in the same objfile. We can't have
721 a C-V variant chain that threads across objfiles: if one
722 objfile gets freed, then the other has a broken C-V chain.
724 This code used to try to copy over the main type from TYPE to
725 *TYPEPTR if they were in different objfiles, but that's
726 wrong, too: TYPE may have a field list or member function
727 lists, which refer to types of their own, etc. etc. The
728 whole shebang would need to be copied over recursively; you
729 can't have inter-objfile pointers. The only thing to do is
730 to leave stub types as stub types, and look them up afresh by
731 name each time you encounter them. */
732 gdb_assert (TYPE_OBJFILE (*typeptr
) == TYPE_OBJFILE (type
));
735 ntype
= make_qualified_type (type
, new_flags
,
736 typeptr
? *typeptr
: NULL
);
744 /* Make a 'restrict'-qualified version of TYPE. */
747 make_restrict_type (struct type
*type
)
749 return make_qualified_type (type
,
750 (TYPE_INSTANCE_FLAGS (type
)
751 | TYPE_INSTANCE_FLAG_RESTRICT
),
755 /* Make a type without const, volatile, or restrict. */
758 make_unqualified_type (struct type
*type
)
760 return make_qualified_type (type
,
761 (TYPE_INSTANCE_FLAGS (type
)
762 & ~(TYPE_INSTANCE_FLAG_CONST
763 | TYPE_INSTANCE_FLAG_VOLATILE
764 | TYPE_INSTANCE_FLAG_RESTRICT
)),
768 /* Make a '_Atomic'-qualified version of TYPE. */
771 make_atomic_type (struct type
*type
)
773 return make_qualified_type (type
,
774 (TYPE_INSTANCE_FLAGS (type
)
775 | TYPE_INSTANCE_FLAG_ATOMIC
),
779 /* Replace the contents of ntype with the type *type. This changes the
780 contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
781 the changes are propogated to all types in the TYPE_CHAIN.
783 In order to build recursive types, it's inevitable that we'll need
784 to update types in place --- but this sort of indiscriminate
785 smashing is ugly, and needs to be replaced with something more
786 controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
787 clear if more steps are needed. */
790 replace_type (struct type
*ntype
, struct type
*type
)
794 /* These two types had better be in the same objfile. Otherwise,
795 the assignment of one type's main type structure to the other
796 will produce a type with references to objects (names; field
797 lists; etc.) allocated on an objfile other than its own. */
798 gdb_assert (TYPE_OBJFILE (ntype
) == TYPE_OBJFILE (type
));
800 *TYPE_MAIN_TYPE (ntype
) = *TYPE_MAIN_TYPE (type
);
802 /* The type length is not a part of the main type. Update it for
803 each type on the variant chain. */
807 /* Assert that this element of the chain has no address-class bits
808 set in its flags. Such type variants might have type lengths
809 which are supposed to be different from the non-address-class
810 variants. This assertion shouldn't ever be triggered because
811 symbol readers which do construct address-class variants don't
812 call replace_type(). */
813 gdb_assert (TYPE_ADDRESS_CLASS_ALL (chain
) == 0);
815 TYPE_LENGTH (chain
) = TYPE_LENGTH (type
);
816 chain
= TYPE_CHAIN (chain
);
818 while (ntype
!= chain
);
820 /* Assert that the two types have equivalent instance qualifiers.
821 This should be true for at least all of our debug readers. */
822 gdb_assert (TYPE_INSTANCE_FLAGS (ntype
) == TYPE_INSTANCE_FLAGS (type
));
825 /* Implement direct support for MEMBER_TYPE in GNU C++.
826 May need to construct such a type if this is the first use.
827 The TYPE is the type of the member. The DOMAIN is the type
828 of the aggregate that the member belongs to. */
831 lookup_memberptr_type (struct type
*type
, struct type
*domain
)
835 mtype
= alloc_type_copy (type
);
836 smash_to_memberptr_type (mtype
, domain
, type
);
840 /* Return a pointer-to-method type, for a method of type TO_TYPE. */
843 lookup_methodptr_type (struct type
*to_type
)
847 mtype
= alloc_type_copy (to_type
);
848 smash_to_methodptr_type (mtype
, to_type
);
852 /* Allocate a stub method whose return type is TYPE. This apparently
853 happens for speed of symbol reading, since parsing out the
854 arguments to the method is cpu-intensive, the way we are doing it.
855 So, we will fill in arguments later. This always returns a fresh
859 allocate_stub_method (struct type
*type
)
863 mtype
= alloc_type_copy (type
);
864 TYPE_CODE (mtype
) = TYPE_CODE_METHOD
;
865 TYPE_LENGTH (mtype
) = 1;
866 TYPE_STUB (mtype
) = 1;
867 TYPE_TARGET_TYPE (mtype
) = type
;
868 /* TYPE_SELF_TYPE (mtype) = unknown yet */
872 /* See gdbtypes.h. */
875 operator== (const dynamic_prop
&l
, const dynamic_prop
&r
)
877 if (l
.kind
!= r
.kind
)
885 return l
.data
.const_val
== r
.data
.const_val
;
886 case PROP_ADDR_OFFSET
:
889 return l
.data
.baton
== r
.data
.baton
;
890 case PROP_VARIANT_PARTS
:
891 return l
.data
.variant_parts
== r
.data
.variant_parts
;
893 return l
.data
.original_type
== r
.data
.original_type
;
896 gdb_assert_not_reached ("unhandled dynamic_prop kind");
899 /* See gdbtypes.h. */
902 operator== (const range_bounds
&l
, const range_bounds
&r
)
904 #define FIELD_EQ(FIELD) (l.FIELD == r.FIELD)
906 return (FIELD_EQ (low
)
908 && FIELD_EQ (flag_upper_bound_is_count
)
909 && FIELD_EQ (flag_bound_evaluated
)
915 /* Create a range type with a dynamic range from LOW_BOUND to
916 HIGH_BOUND, inclusive. See create_range_type for further details. */
919 create_range_type (struct type
*result_type
, struct type
*index_type
,
920 const struct dynamic_prop
*low_bound
,
921 const struct dynamic_prop
*high_bound
,
924 /* The INDEX_TYPE should be a type capable of holding the upper and lower
925 bounds, as such a zero sized, or void type makes no sense. */
926 gdb_assert (TYPE_CODE (index_type
) != TYPE_CODE_VOID
);
927 gdb_assert (TYPE_LENGTH (index_type
) > 0);
929 if (result_type
== NULL
)
930 result_type
= alloc_type_copy (index_type
);
931 TYPE_CODE (result_type
) = TYPE_CODE_RANGE
;
932 TYPE_TARGET_TYPE (result_type
) = index_type
;
933 if (TYPE_STUB (index_type
))
934 TYPE_TARGET_STUB (result_type
) = 1;
936 TYPE_LENGTH (result_type
) = TYPE_LENGTH (check_typedef (index_type
));
938 TYPE_RANGE_DATA (result_type
) = (struct range_bounds
*)
939 TYPE_ZALLOC (result_type
, sizeof (struct range_bounds
));
940 TYPE_RANGE_DATA (result_type
)->low
= *low_bound
;
941 TYPE_RANGE_DATA (result_type
)->high
= *high_bound
;
942 TYPE_RANGE_DATA (result_type
)->bias
= bias
;
944 /* Initialize the stride to be a constant, the value will already be zero
945 thanks to the use of TYPE_ZALLOC above. */
946 TYPE_RANGE_DATA (result_type
)->stride
.kind
= PROP_CONST
;
948 if (low_bound
->kind
== PROP_CONST
&& low_bound
->data
.const_val
>= 0)
949 TYPE_UNSIGNED (result_type
) = 1;
951 /* Ada allows the declaration of range types whose upper bound is
952 less than the lower bound, so checking the lower bound is not
953 enough. Make sure we do not mark a range type whose upper bound
954 is negative as unsigned. */
955 if (high_bound
->kind
== PROP_CONST
&& high_bound
->data
.const_val
< 0)
956 TYPE_UNSIGNED (result_type
) = 0;
958 TYPE_ENDIANITY_NOT_DEFAULT (result_type
)
959 = TYPE_ENDIANITY_NOT_DEFAULT (index_type
);
964 /* See gdbtypes.h. */
967 create_range_type_with_stride (struct type
*result_type
,
968 struct type
*index_type
,
969 const struct dynamic_prop
*low_bound
,
970 const struct dynamic_prop
*high_bound
,
972 const struct dynamic_prop
*stride
,
975 result_type
= create_range_type (result_type
, index_type
, low_bound
,
978 gdb_assert (stride
!= nullptr);
979 TYPE_RANGE_DATA (result_type
)->stride
= *stride
;
980 TYPE_RANGE_DATA (result_type
)->flag_is_byte_stride
= byte_stride_p
;
987 /* Create a range type using either a blank type supplied in
988 RESULT_TYPE, or creating a new type, inheriting the objfile from
991 Indices will be of type INDEX_TYPE, and will range from LOW_BOUND
992 to HIGH_BOUND, inclusive.
994 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
995 sure it is TYPE_CODE_UNDEF before we bash it into a range type? */
998 create_static_range_type (struct type
*result_type
, struct type
*index_type
,
999 LONGEST low_bound
, LONGEST high_bound
)
1001 struct dynamic_prop low
, high
;
1003 low
.kind
= PROP_CONST
;
1004 low
.data
.const_val
= low_bound
;
1006 high
.kind
= PROP_CONST
;
1007 high
.data
.const_val
= high_bound
;
1009 result_type
= create_range_type (result_type
, index_type
, &low
, &high
, 0);
1014 /* Predicate tests whether BOUNDS are static. Returns 1 if all bounds values
1015 are static, otherwise returns 0. */
1018 has_static_range (const struct range_bounds
*bounds
)
1020 /* If the range doesn't have a defined stride then its stride field will
1021 be initialized to the constant 0. */
1022 return (bounds
->low
.kind
== PROP_CONST
1023 && bounds
->high
.kind
== PROP_CONST
1024 && bounds
->stride
.kind
== PROP_CONST
);
1028 /* Set *LOWP and *HIGHP to the lower and upper bounds of discrete type
1029 TYPE. Return 1 if type is a range type, 0 if it is discrete (and
1030 bounds will fit in LONGEST), or -1 otherwise. */
1033 get_discrete_bounds (struct type
*type
, LONGEST
*lowp
, LONGEST
*highp
)
1035 type
= check_typedef (type
);
1036 switch (TYPE_CODE (type
))
1038 case TYPE_CODE_RANGE
:
1039 *lowp
= TYPE_LOW_BOUND (type
);
1040 *highp
= TYPE_HIGH_BOUND (type
);
1042 case TYPE_CODE_ENUM
:
1043 if (TYPE_NFIELDS (type
) > 0)
1045 /* The enums may not be sorted by value, so search all
1049 *lowp
= *highp
= TYPE_FIELD_ENUMVAL (type
, 0);
1050 for (i
= 0; i
< TYPE_NFIELDS (type
); i
++)
1052 if (TYPE_FIELD_ENUMVAL (type
, i
) < *lowp
)
1053 *lowp
= TYPE_FIELD_ENUMVAL (type
, i
);
1054 if (TYPE_FIELD_ENUMVAL (type
, i
) > *highp
)
1055 *highp
= TYPE_FIELD_ENUMVAL (type
, i
);
1058 /* Set unsigned indicator if warranted. */
1061 TYPE_UNSIGNED (type
) = 1;
1070 case TYPE_CODE_BOOL
:
1075 if (TYPE_LENGTH (type
) > sizeof (LONGEST
)) /* Too big */
1077 if (!TYPE_UNSIGNED (type
))
1079 *lowp
= -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
1080 *highp
= -*lowp
- 1;
1084 case TYPE_CODE_CHAR
:
1086 /* This round-about calculation is to avoid shifting by
1087 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
1088 if TYPE_LENGTH (type) == sizeof (LONGEST). */
1089 *highp
= 1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1);
1090 *highp
= (*highp
- 1) | *highp
;
1097 /* Assuming TYPE is a simple, non-empty array type, compute its upper
1098 and lower bound. Save the low bound into LOW_BOUND if not NULL.
1099 Save the high bound into HIGH_BOUND if not NULL.
1101 Return 1 if the operation was successful. Return zero otherwise,
1102 in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified.
1104 We now simply use get_discrete_bounds call to get the values
1105 of the low and high bounds.
1106 get_discrete_bounds can return three values:
1107 1, meaning that index is a range,
1108 0, meaning that index is a discrete type,
1109 or -1 for failure. */
1112 get_array_bounds (struct type
*type
, LONGEST
*low_bound
, LONGEST
*high_bound
)
1114 struct type
*index
= TYPE_INDEX_TYPE (type
);
1122 res
= get_discrete_bounds (index
, &low
, &high
);
1126 /* Check if the array bounds are undefined. */
1128 && ((low_bound
&& TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type
))
1129 || (high_bound
&& TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))))
1141 /* Assuming that TYPE is a discrete type and VAL is a valid integer
1142 representation of a value of this type, save the corresponding
1143 position number in POS.
1145 Its differs from VAL only in the case of enumeration types. In
1146 this case, the position number of the value of the first listed
1147 enumeration literal is zero; the position number of the value of
1148 each subsequent enumeration literal is one more than that of its
1149 predecessor in the list.
1151 Return 1 if the operation was successful. Return zero otherwise,
1152 in which case the value of POS is unmodified.
1156 discrete_position (struct type
*type
, LONGEST val
, LONGEST
*pos
)
1158 if (TYPE_CODE (type
) == TYPE_CODE_ENUM
)
1162 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
1164 if (val
== TYPE_FIELD_ENUMVAL (type
, i
))
1170 /* Invalid enumeration value. */
1180 /* If the array TYPE has static bounds calculate and update its
1181 size, then return true. Otherwise return false and leave TYPE
1185 update_static_array_size (struct type
*type
)
1187 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_ARRAY
);
1189 struct type
*range_type
= TYPE_INDEX_TYPE (type
);
1191 if (type
->dyn_prop (DYN_PROP_BYTE_STRIDE
) == nullptr
1192 && has_static_range (TYPE_RANGE_DATA (range_type
))
1193 && (!type_not_associated (type
)
1194 && !type_not_allocated (type
)))
1196 LONGEST low_bound
, high_bound
;
1198 struct type
*element_type
;
1200 /* If the array itself doesn't provide a stride value then take
1201 whatever stride the range provides. Don't update BIT_STRIDE as
1202 we don't want to place the stride value from the range into this
1203 arrays bit size field. */
1204 stride
= TYPE_FIELD_BITSIZE (type
, 0);
1206 stride
= TYPE_BIT_STRIDE (range_type
);
1208 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
1209 low_bound
= high_bound
= 0;
1210 element_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1211 /* Be careful when setting the array length. Ada arrays can be
1212 empty arrays with the high_bound being smaller than the low_bound.
1213 In such cases, the array length should be zero. */
1214 if (high_bound
< low_bound
)
1215 TYPE_LENGTH (type
) = 0;
1216 else if (stride
!= 0)
1218 /* Ensure that the type length is always positive, even in the
1219 case where (for example in Fortran) we have a negative
1220 stride. It is possible to have a single element array with a
1221 negative stride in Fortran (this doesn't mean anything
1222 special, it's still just a single element array) so do
1223 consider that case when touching this code. */
1224 LONGEST element_count
= std::abs (high_bound
- low_bound
+ 1);
1226 = ((std::abs (stride
) * element_count
) + 7) / 8;
1229 TYPE_LENGTH (type
) =
1230 TYPE_LENGTH (element_type
) * (high_bound
- low_bound
+ 1);
1238 /* Create an array type using either a blank type supplied in
1239 RESULT_TYPE, or creating a new type, inheriting the objfile from
1242 Elements will be of type ELEMENT_TYPE, the indices will be of type
1245 BYTE_STRIDE_PROP, when not NULL, provides the array's byte stride.
1246 This byte stride property is added to the resulting array type
1247 as a DYN_PROP_BYTE_STRIDE. As a consequence, the BYTE_STRIDE_PROP
1248 argument can only be used to create types that are objfile-owned
1249 (see add_dyn_prop), meaning that either this function must be called
1250 with an objfile-owned RESULT_TYPE, or an objfile-owned RANGE_TYPE.
1252 BIT_STRIDE is taken into account only when BYTE_STRIDE_PROP is NULL.
1253 If BIT_STRIDE is not zero, build a packed array type whose element
1254 size is BIT_STRIDE. Otherwise, ignore this parameter.
1256 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1257 sure it is TYPE_CODE_UNDEF before we bash it into an array
1261 create_array_type_with_stride (struct type
*result_type
,
1262 struct type
*element_type
,
1263 struct type
*range_type
,
1264 struct dynamic_prop
*byte_stride_prop
,
1265 unsigned int bit_stride
)
1267 if (byte_stride_prop
!= NULL
1268 && byte_stride_prop
->kind
== PROP_CONST
)
1270 /* The byte stride is actually not dynamic. Pretend we were
1271 called with bit_stride set instead of byte_stride_prop.
1272 This will give us the same result type, while avoiding
1273 the need to handle this as a special case. */
1274 bit_stride
= byte_stride_prop
->data
.const_val
* 8;
1275 byte_stride_prop
= NULL
;
1278 if (result_type
== NULL
)
1279 result_type
= alloc_type_copy (range_type
);
1281 TYPE_CODE (result_type
) = TYPE_CODE_ARRAY
;
1282 TYPE_TARGET_TYPE (result_type
) = element_type
;
1284 TYPE_NFIELDS (result_type
) = 1;
1285 TYPE_FIELDS (result_type
) =
1286 (struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
));
1287 TYPE_INDEX_TYPE (result_type
) = range_type
;
1288 if (byte_stride_prop
!= NULL
)
1289 add_dyn_prop (DYN_PROP_BYTE_STRIDE
, *byte_stride_prop
, result_type
);
1290 else if (bit_stride
> 0)
1291 TYPE_FIELD_BITSIZE (result_type
, 0) = bit_stride
;
1293 if (!update_static_array_size (result_type
))
1295 /* This type is dynamic and its length needs to be computed
1296 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1297 undefined by setting it to zero. Although we are not expected
1298 to trust TYPE_LENGTH in this case, setting the size to zero
1299 allows us to avoid allocating objects of random sizes in case
1300 we accidently do. */
1301 TYPE_LENGTH (result_type
) = 0;
1304 /* TYPE_TARGET_STUB will take care of zero length arrays. */
1305 if (TYPE_LENGTH (result_type
) == 0)
1306 TYPE_TARGET_STUB (result_type
) = 1;
1311 /* Same as create_array_type_with_stride but with no bit_stride
1312 (BIT_STRIDE = 0), thus building an unpacked array. */
1315 create_array_type (struct type
*result_type
,
1316 struct type
*element_type
,
1317 struct type
*range_type
)
1319 return create_array_type_with_stride (result_type
, element_type
,
1320 range_type
, NULL
, 0);
1324 lookup_array_range_type (struct type
*element_type
,
1325 LONGEST low_bound
, LONGEST high_bound
)
1327 struct type
*index_type
;
1328 struct type
*range_type
;
1330 if (TYPE_OBJFILE_OWNED (element_type
))
1331 index_type
= objfile_type (TYPE_OWNER (element_type
).objfile
)->builtin_int
;
1333 index_type
= builtin_type (get_type_arch (element_type
))->builtin_int
;
1334 range_type
= create_static_range_type (NULL
, index_type
,
1335 low_bound
, high_bound
);
1337 return create_array_type (NULL
, element_type
, range_type
);
1340 /* Create a string type using either a blank type supplied in
1341 RESULT_TYPE, or creating a new type. String types are similar
1342 enough to array of char types that we can use create_array_type to
1343 build the basic type and then bash it into a string type.
1345 For fixed length strings, the range type contains 0 as the lower
1346 bound and the length of the string minus one as the upper bound.
1348 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1349 sure it is TYPE_CODE_UNDEF before we bash it into a string
1353 create_string_type (struct type
*result_type
,
1354 struct type
*string_char_type
,
1355 struct type
*range_type
)
1357 result_type
= create_array_type (result_type
,
1360 TYPE_CODE (result_type
) = TYPE_CODE_STRING
;
1365 lookup_string_range_type (struct type
*string_char_type
,
1366 LONGEST low_bound
, LONGEST high_bound
)
1368 struct type
*result_type
;
1370 result_type
= lookup_array_range_type (string_char_type
,
1371 low_bound
, high_bound
);
1372 TYPE_CODE (result_type
) = TYPE_CODE_STRING
;
1377 create_set_type (struct type
*result_type
, struct type
*domain_type
)
1379 if (result_type
== NULL
)
1380 result_type
= alloc_type_copy (domain_type
);
1382 TYPE_CODE (result_type
) = TYPE_CODE_SET
;
1383 TYPE_NFIELDS (result_type
) = 1;
1384 TYPE_FIELDS (result_type
)
1385 = (struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
));
1387 if (!TYPE_STUB (domain_type
))
1389 LONGEST low_bound
, high_bound
, bit_length
;
1391 if (get_discrete_bounds (domain_type
, &low_bound
, &high_bound
) < 0)
1392 low_bound
= high_bound
= 0;
1393 bit_length
= high_bound
- low_bound
+ 1;
1394 TYPE_LENGTH (result_type
)
1395 = (bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1397 TYPE_UNSIGNED (result_type
) = 1;
1399 TYPE_FIELD_TYPE (result_type
, 0) = domain_type
;
1404 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1405 and any array types nested inside it. */
1408 make_vector_type (struct type
*array_type
)
1410 struct type
*inner_array
, *elt_type
;
1413 /* Find the innermost array type, in case the array is
1414 multi-dimensional. */
1415 inner_array
= array_type
;
1416 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
1417 inner_array
= TYPE_TARGET_TYPE (inner_array
);
1419 elt_type
= TYPE_TARGET_TYPE (inner_array
);
1420 if (TYPE_CODE (elt_type
) == TYPE_CODE_INT
)
1422 flags
= TYPE_INSTANCE_FLAGS (elt_type
) | TYPE_INSTANCE_FLAG_NOTTEXT
;
1423 elt_type
= make_qualified_type (elt_type
, flags
, NULL
);
1424 TYPE_TARGET_TYPE (inner_array
) = elt_type
;
1427 TYPE_VECTOR (array_type
) = 1;
1431 init_vector_type (struct type
*elt_type
, int n
)
1433 struct type
*array_type
;
1435 array_type
= lookup_array_range_type (elt_type
, 0, n
- 1);
1436 make_vector_type (array_type
);
1440 /* Internal routine called by TYPE_SELF_TYPE to return the type that TYPE
1441 belongs to. In c++ this is the class of "this", but TYPE_THIS_TYPE is too
1442 confusing. "self" is a common enough replacement for "this".
1443 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1444 TYPE_CODE_METHOD. */
1447 internal_type_self_type (struct type
*type
)
1449 switch (TYPE_CODE (type
))
1451 case TYPE_CODE_METHODPTR
:
1452 case TYPE_CODE_MEMBERPTR
:
1453 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1455 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1456 return TYPE_MAIN_TYPE (type
)->type_specific
.self_type
;
1457 case TYPE_CODE_METHOD
:
1458 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1460 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1461 return TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
;
1463 gdb_assert_not_reached ("bad type");
1467 /* Set the type of the class that TYPE belongs to.
1468 In c++ this is the class of "this".
1469 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1470 TYPE_CODE_METHOD. */
1473 set_type_self_type (struct type
*type
, struct type
*self_type
)
1475 switch (TYPE_CODE (type
))
1477 case TYPE_CODE_METHODPTR
:
1478 case TYPE_CODE_MEMBERPTR
:
1479 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1480 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_SELF_TYPE
;
1481 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1482 TYPE_MAIN_TYPE (type
)->type_specific
.self_type
= self_type
;
1484 case TYPE_CODE_METHOD
:
1485 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1486 INIT_FUNC_SPECIFIC (type
);
1487 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1488 TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
= self_type
;
1491 gdb_assert_not_reached ("bad type");
1495 /* Smash TYPE to be a type of pointers to members of SELF_TYPE with type
1496 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1497 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1498 TYPE doesn't include the offset (that's the value of the MEMBER
1499 itself), but does include the structure type into which it points
1502 When "smashing" the type, we preserve the objfile that the old type
1503 pointed to, since we aren't changing where the type is actually
1507 smash_to_memberptr_type (struct type
*type
, struct type
*self_type
,
1508 struct type
*to_type
)
1511 TYPE_CODE (type
) = TYPE_CODE_MEMBERPTR
;
1512 TYPE_TARGET_TYPE (type
) = to_type
;
1513 set_type_self_type (type
, self_type
);
1514 /* Assume that a data member pointer is the same size as a normal
1517 = gdbarch_ptr_bit (get_type_arch (to_type
)) / TARGET_CHAR_BIT
;
1520 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1522 When "smashing" the type, we preserve the objfile that the old type
1523 pointed to, since we aren't changing where the type is actually
1527 smash_to_methodptr_type (struct type
*type
, struct type
*to_type
)
1530 TYPE_CODE (type
) = TYPE_CODE_METHODPTR
;
1531 TYPE_TARGET_TYPE (type
) = to_type
;
1532 set_type_self_type (type
, TYPE_SELF_TYPE (to_type
));
1533 TYPE_LENGTH (type
) = cplus_method_ptr_size (to_type
);
1536 /* Smash TYPE to be a type of method of SELF_TYPE with type TO_TYPE.
1537 METHOD just means `function that gets an extra "this" argument'.
1539 When "smashing" the type, we preserve the objfile that the old type
1540 pointed to, since we aren't changing where the type is actually
1544 smash_to_method_type (struct type
*type
, struct type
*self_type
,
1545 struct type
*to_type
, struct field
*args
,
1546 int nargs
, int varargs
)
1549 TYPE_CODE (type
) = TYPE_CODE_METHOD
;
1550 TYPE_TARGET_TYPE (type
) = to_type
;
1551 set_type_self_type (type
, self_type
);
1552 TYPE_FIELDS (type
) = args
;
1553 TYPE_NFIELDS (type
) = nargs
;
1555 TYPE_VARARGS (type
) = 1;
1556 TYPE_LENGTH (type
) = 1; /* In practice, this is never needed. */
1559 /* A wrapper of TYPE_NAME which calls error if the type is anonymous.
1560 Since GCC PR debug/47510 DWARF provides associated information to detect the
1561 anonymous class linkage name from its typedef.
1563 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1567 type_name_or_error (struct type
*type
)
1569 struct type
*saved_type
= type
;
1571 struct objfile
*objfile
;
1573 type
= check_typedef (type
);
1575 name
= TYPE_NAME (type
);
1579 name
= TYPE_NAME (saved_type
);
1580 objfile
= TYPE_OBJFILE (saved_type
);
1581 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1582 name
? name
: "<anonymous>",
1583 objfile
? objfile_name (objfile
) : "<arch>");
1586 /* Lookup a typedef or primitive type named NAME, visible in lexical
1587 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1588 suitably defined. */
1591 lookup_typename (const struct language_defn
*language
,
1593 const struct block
*block
, int noerr
)
1597 sym
= lookup_symbol_in_language (name
, block
, VAR_DOMAIN
,
1598 language
->la_language
, NULL
).symbol
;
1599 if (sym
!= NULL
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
1600 return SYMBOL_TYPE (sym
);
1604 error (_("No type named %s."), name
);
1608 lookup_unsigned_typename (const struct language_defn
*language
,
1611 char *uns
= (char *) alloca (strlen (name
) + 10);
1613 strcpy (uns
, "unsigned ");
1614 strcpy (uns
+ 9, name
);
1615 return lookup_typename (language
, uns
, NULL
, 0);
1619 lookup_signed_typename (const struct language_defn
*language
, const char *name
)
1622 char *uns
= (char *) alloca (strlen (name
) + 8);
1624 strcpy (uns
, "signed ");
1625 strcpy (uns
+ 7, name
);
1626 t
= lookup_typename (language
, uns
, NULL
, 1);
1627 /* If we don't find "signed FOO" just try again with plain "FOO". */
1630 return lookup_typename (language
, name
, NULL
, 0);
1633 /* Lookup a structure type named "struct NAME",
1634 visible in lexical block BLOCK. */
1637 lookup_struct (const char *name
, const struct block
*block
)
1641 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1645 error (_("No struct type named %s."), name
);
1647 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_STRUCT
)
1649 error (_("This context has class, union or enum %s, not a struct."),
1652 return (SYMBOL_TYPE (sym
));
1655 /* Lookup a union type named "union NAME",
1656 visible in lexical block BLOCK. */
1659 lookup_union (const char *name
, const struct block
*block
)
1664 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1667 error (_("No union type named %s."), name
);
1669 t
= SYMBOL_TYPE (sym
);
1671 if (TYPE_CODE (t
) == TYPE_CODE_UNION
)
1674 /* If we get here, it's not a union. */
1675 error (_("This context has class, struct or enum %s, not a union."),
1679 /* Lookup an enum type named "enum NAME",
1680 visible in lexical block BLOCK. */
1683 lookup_enum (const char *name
, const struct block
*block
)
1687 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1690 error (_("No enum type named %s."), name
);
1692 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_ENUM
)
1694 error (_("This context has class, struct or union %s, not an enum."),
1697 return (SYMBOL_TYPE (sym
));
1700 /* Lookup a template type named "template NAME<TYPE>",
1701 visible in lexical block BLOCK. */
1704 lookup_template_type (const char *name
, struct type
*type
,
1705 const struct block
*block
)
1708 char *nam
= (char *)
1709 alloca (strlen (name
) + strlen (TYPE_NAME (type
)) + 4);
1713 strcat (nam
, TYPE_NAME (type
));
1714 strcat (nam
, " >"); /* FIXME, extra space still introduced in gcc? */
1716 sym
= lookup_symbol (nam
, block
, VAR_DOMAIN
, 0).symbol
;
1720 error (_("No template type named %s."), name
);
1722 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_STRUCT
)
1724 error (_("This context has class, union or enum %s, not a struct."),
1727 return (SYMBOL_TYPE (sym
));
1730 /* See gdbtypes.h. */
1733 lookup_struct_elt (struct type
*type
, const char *name
, int noerr
)
1739 type
= check_typedef (type
);
1740 if (TYPE_CODE (type
) != TYPE_CODE_PTR
1741 && TYPE_CODE (type
) != TYPE_CODE_REF
)
1743 type
= TYPE_TARGET_TYPE (type
);
1746 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
1747 && TYPE_CODE (type
) != TYPE_CODE_UNION
)
1749 std::string type_name
= type_to_string (type
);
1750 error (_("Type %s is not a structure or union type."),
1751 type_name
.c_str ());
1754 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1756 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1758 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1760 return {&TYPE_FIELD (type
, i
), TYPE_FIELD_BITPOS (type
, i
)};
1762 else if (!t_field_name
|| *t_field_name
== '\0')
1765 = lookup_struct_elt (TYPE_FIELD_TYPE (type
, i
), name
, 1);
1766 if (elt
.field
!= NULL
)
1768 elt
.offset
+= TYPE_FIELD_BITPOS (type
, i
);
1774 /* OK, it's not in this class. Recursively check the baseclasses. */
1775 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1777 struct_elt elt
= lookup_struct_elt (TYPE_BASECLASS (type
, i
), name
, 1);
1778 if (elt
.field
!= NULL
)
1783 return {nullptr, 0};
1785 std::string type_name
= type_to_string (type
);
1786 error (_("Type %s has no component named %s."), type_name
.c_str (), name
);
1789 /* See gdbtypes.h. */
1792 lookup_struct_elt_type (struct type
*type
, const char *name
, int noerr
)
1794 struct_elt elt
= lookup_struct_elt (type
, name
, noerr
);
1795 if (elt
.field
!= NULL
)
1796 return FIELD_TYPE (*elt
.field
);
1801 /* Store in *MAX the largest number representable by unsigned integer type
1805 get_unsigned_type_max (struct type
*type
, ULONGEST
*max
)
1809 type
= check_typedef (type
);
1810 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_INT
&& TYPE_UNSIGNED (type
));
1811 gdb_assert (TYPE_LENGTH (type
) <= sizeof (ULONGEST
));
1813 /* Written this way to avoid overflow. */
1814 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1815 *max
= ((((ULONGEST
) 1 << (n
- 1)) - 1) << 1) | 1;
1818 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1819 signed integer type TYPE. */
1822 get_signed_type_minmax (struct type
*type
, LONGEST
*min
, LONGEST
*max
)
1826 type
= check_typedef (type
);
1827 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_INT
&& !TYPE_UNSIGNED (type
));
1828 gdb_assert (TYPE_LENGTH (type
) <= sizeof (LONGEST
));
1830 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1831 *min
= -((ULONGEST
) 1 << (n
- 1));
1832 *max
= ((ULONGEST
) 1 << (n
- 1)) - 1;
1835 /* Internal routine called by TYPE_VPTR_FIELDNO to return the value of
1836 cplus_stuff.vptr_fieldno.
1838 cplus_stuff is initialized to cplus_struct_default which does not
1839 set vptr_fieldno to -1 for portability reasons (IWBN to use C99
1840 designated initializers). We cope with that here. */
1843 internal_type_vptr_fieldno (struct type
*type
)
1845 type
= check_typedef (type
);
1846 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1847 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1848 if (!HAVE_CPLUS_STRUCT (type
))
1850 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
;
1853 /* Set the value of cplus_stuff.vptr_fieldno. */
1856 set_type_vptr_fieldno (struct type
*type
, int fieldno
)
1858 type
= check_typedef (type
);
1859 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1860 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1861 if (!HAVE_CPLUS_STRUCT (type
))
1862 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1863 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
= fieldno
;
1866 /* Internal routine called by TYPE_VPTR_BASETYPE to return the value of
1867 cplus_stuff.vptr_basetype. */
1870 internal_type_vptr_basetype (struct type
*type
)
1872 type
= check_typedef (type
);
1873 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1874 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1875 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_CPLUS_STUFF
);
1876 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
;
1879 /* Set the value of cplus_stuff.vptr_basetype. */
1882 set_type_vptr_basetype (struct type
*type
, struct type
*basetype
)
1884 type
= check_typedef (type
);
1885 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1886 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1887 if (!HAVE_CPLUS_STRUCT (type
))
1888 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1889 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
= basetype
;
1892 /* Lookup the vptr basetype/fieldno values for TYPE.
1893 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
1894 vptr_fieldno. Also, if found and basetype is from the same objfile,
1896 If not found, return -1 and ignore BASETYPEP.
1897 Callers should be aware that in some cases (for example,
1898 the type or one of its baseclasses is a stub type and we are
1899 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
1900 this function will not be able to find the
1901 virtual function table pointer, and vptr_fieldno will remain -1 and
1902 vptr_basetype will remain NULL or incomplete. */
1905 get_vptr_fieldno (struct type
*type
, struct type
**basetypep
)
1907 type
= check_typedef (type
);
1909 if (TYPE_VPTR_FIELDNO (type
) < 0)
1913 /* We must start at zero in case the first (and only) baseclass
1914 is virtual (and hence we cannot share the table pointer). */
1915 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
1917 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
1919 struct type
*basetype
;
1921 fieldno
= get_vptr_fieldno (baseclass
, &basetype
);
1924 /* If the type comes from a different objfile we can't cache
1925 it, it may have a different lifetime. PR 2384 */
1926 if (TYPE_OBJFILE (type
) == TYPE_OBJFILE (basetype
))
1928 set_type_vptr_fieldno (type
, fieldno
);
1929 set_type_vptr_basetype (type
, basetype
);
1932 *basetypep
= basetype
;
1943 *basetypep
= TYPE_VPTR_BASETYPE (type
);
1944 return TYPE_VPTR_FIELDNO (type
);
1949 stub_noname_complaint (void)
1951 complaint (_("stub type has NULL name"));
1954 /* Return nonzero if TYPE has a DYN_PROP_BYTE_STRIDE dynamic property
1955 attached to it, and that property has a non-constant value. */
1958 array_type_has_dynamic_stride (struct type
*type
)
1960 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
1962 return (prop
!= NULL
&& prop
->kind
!= PROP_CONST
);
1965 /* Worker for is_dynamic_type. */
1968 is_dynamic_type_internal (struct type
*type
, int top_level
)
1970 type
= check_typedef (type
);
1972 /* We only want to recognize references at the outermost level. */
1973 if (top_level
&& TYPE_CODE (type
) == TYPE_CODE_REF
)
1974 type
= check_typedef (TYPE_TARGET_TYPE (type
));
1976 /* Types that have a dynamic TYPE_DATA_LOCATION are considered
1977 dynamic, even if the type itself is statically defined.
1978 From a user's point of view, this may appear counter-intuitive;
1979 but it makes sense in this context, because the point is to determine
1980 whether any part of the type needs to be resolved before it can
1982 if (TYPE_DATA_LOCATION (type
) != NULL
1983 && (TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCEXPR
1984 || TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCLIST
))
1987 if (TYPE_ASSOCIATED_PROP (type
))
1990 if (TYPE_ALLOCATED_PROP (type
))
1993 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
1994 if (prop
!= nullptr && prop
->kind
!= PROP_TYPE
)
1997 if (TYPE_HAS_DYNAMIC_LENGTH (type
))
2000 switch (TYPE_CODE (type
))
2002 case TYPE_CODE_RANGE
:
2004 /* A range type is obviously dynamic if it has at least one
2005 dynamic bound. But also consider the range type to be
2006 dynamic when its subtype is dynamic, even if the bounds
2007 of the range type are static. It allows us to assume that
2008 the subtype of a static range type is also static. */
2009 return (!has_static_range (TYPE_RANGE_DATA (type
))
2010 || is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0));
2013 case TYPE_CODE_STRING
:
2014 /* Strings are very much like an array of characters, and can be
2015 treated as one here. */
2016 case TYPE_CODE_ARRAY
:
2018 gdb_assert (TYPE_NFIELDS (type
) == 1);
2020 /* The array is dynamic if either the bounds are dynamic... */
2021 if (is_dynamic_type_internal (TYPE_INDEX_TYPE (type
), 0))
2023 /* ... or the elements it contains have a dynamic contents... */
2024 if (is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0))
2026 /* ... or if it has a dynamic stride... */
2027 if (array_type_has_dynamic_stride (type
))
2032 case TYPE_CODE_STRUCT
:
2033 case TYPE_CODE_UNION
:
2037 bool is_cplus
= HAVE_CPLUS_STRUCT (type
);
2039 for (i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
2041 /* Static fields can be ignored here. */
2042 if (field_is_static (&TYPE_FIELD (type
, i
)))
2044 /* If the field has dynamic type, then so does TYPE. */
2045 if (is_dynamic_type_internal (TYPE_FIELD_TYPE (type
, i
), 0))
2047 /* If the field is at a fixed offset, then it is not
2049 if (TYPE_FIELD_LOC_KIND (type
, i
) != FIELD_LOC_KIND_DWARF_BLOCK
)
2051 /* Do not consider C++ virtual base types to be dynamic
2052 due to the field's offset being dynamic; these are
2053 handled via other means. */
2054 if (is_cplus
&& BASETYPE_VIA_VIRTUAL (type
, i
))
2065 /* See gdbtypes.h. */
2068 is_dynamic_type (struct type
*type
)
2070 return is_dynamic_type_internal (type
, 1);
2073 static struct type
*resolve_dynamic_type_internal
2074 (struct type
*type
, struct property_addr_info
*addr_stack
, int top_level
);
2076 /* Given a dynamic range type (dyn_range_type) and a stack of
2077 struct property_addr_info elements, return a static version
2080 static struct type
*
2081 resolve_dynamic_range (struct type
*dyn_range_type
,
2082 struct property_addr_info
*addr_stack
)
2085 struct type
*static_range_type
, *static_target_type
;
2086 const struct dynamic_prop
*prop
;
2087 struct dynamic_prop low_bound
, high_bound
, stride
;
2089 gdb_assert (TYPE_CODE (dyn_range_type
) == TYPE_CODE_RANGE
);
2091 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->low
;
2092 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2094 low_bound
.kind
= PROP_CONST
;
2095 low_bound
.data
.const_val
= value
;
2099 low_bound
.kind
= PROP_UNDEFINED
;
2100 low_bound
.data
.const_val
= 0;
2103 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->high
;
2104 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2106 high_bound
.kind
= PROP_CONST
;
2107 high_bound
.data
.const_val
= value
;
2109 if (TYPE_RANGE_DATA (dyn_range_type
)->flag_upper_bound_is_count
)
2110 high_bound
.data
.const_val
2111 = low_bound
.data
.const_val
+ high_bound
.data
.const_val
- 1;
2115 high_bound
.kind
= PROP_UNDEFINED
;
2116 high_bound
.data
.const_val
= 0;
2119 bool byte_stride_p
= TYPE_RANGE_DATA (dyn_range_type
)->flag_is_byte_stride
;
2120 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->stride
;
2121 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2123 stride
.kind
= PROP_CONST
;
2124 stride
.data
.const_val
= value
;
2126 /* If we have a bit stride that is not an exact number of bytes then
2127 I really don't think this is going to work with current GDB, the
2128 array indexing code in GDB seems to be pretty heavily tied to byte
2129 offsets right now. Assuming 8 bits in a byte. */
2130 struct gdbarch
*gdbarch
= get_type_arch (dyn_range_type
);
2131 int unit_size
= gdbarch_addressable_memory_unit_size (gdbarch
);
2132 if (!byte_stride_p
&& (value
% (unit_size
* 8)) != 0)
2133 error (_("bit strides that are not a multiple of the byte size "
2134 "are currently not supported"));
2138 stride
.kind
= PROP_UNDEFINED
;
2139 stride
.data
.const_val
= 0;
2140 byte_stride_p
= true;
2144 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (dyn_range_type
),
2146 LONGEST bias
= TYPE_RANGE_DATA (dyn_range_type
)->bias
;
2147 static_range_type
= create_range_type_with_stride
2148 (copy_type (dyn_range_type
), static_target_type
,
2149 &low_bound
, &high_bound
, bias
, &stride
, byte_stride_p
);
2150 TYPE_RANGE_DATA (static_range_type
)->flag_bound_evaluated
= 1;
2151 return static_range_type
;
2154 /* Resolves dynamic bound values of an array or string type TYPE to static
2155 ones. ADDR_STACK is a stack of struct property_addr_info to be used if
2156 needed during the dynamic resolution. */
2158 static struct type
*
2159 resolve_dynamic_array_or_string (struct type
*type
,
2160 struct property_addr_info
*addr_stack
)
2163 struct type
*elt_type
;
2164 struct type
*range_type
;
2165 struct type
*ary_dim
;
2166 struct dynamic_prop
*prop
;
2167 unsigned int bit_stride
= 0;
2169 /* For dynamic type resolution strings can be treated like arrays of
2171 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_ARRAY
2172 || TYPE_CODE (type
) == TYPE_CODE_STRING
);
2174 type
= copy_type (type
);
2177 range_type
= check_typedef (TYPE_INDEX_TYPE (elt_type
));
2178 range_type
= resolve_dynamic_range (range_type
, addr_stack
);
2180 /* Resolve allocated/associated here before creating a new array type, which
2181 will update the length of the array accordingly. */
2182 prop
= TYPE_ALLOCATED_PROP (type
);
2183 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2185 TYPE_DYN_PROP_ADDR (prop
) = value
;
2186 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2188 prop
= TYPE_ASSOCIATED_PROP (type
);
2189 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2191 TYPE_DYN_PROP_ADDR (prop
) = value
;
2192 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2195 ary_dim
= check_typedef (TYPE_TARGET_TYPE (elt_type
));
2197 if (ary_dim
!= NULL
&& TYPE_CODE (ary_dim
) == TYPE_CODE_ARRAY
)
2198 elt_type
= resolve_dynamic_array_or_string (ary_dim
, addr_stack
);
2200 elt_type
= TYPE_TARGET_TYPE (type
);
2202 prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
2205 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2207 remove_dyn_prop (DYN_PROP_BYTE_STRIDE
, type
);
2208 bit_stride
= (unsigned int) (value
* 8);
2212 /* Could be a bug in our code, but it could also happen
2213 if the DWARF info is not correct. Issue a warning,
2214 and assume no byte/bit stride (leave bit_stride = 0). */
2215 warning (_("cannot determine array stride for type %s"),
2216 TYPE_NAME (type
) ? TYPE_NAME (type
) : "<no name>");
2220 bit_stride
= TYPE_FIELD_BITSIZE (type
, 0);
2222 return create_array_type_with_stride (type
, elt_type
, range_type
, NULL
,
2226 /* Resolve dynamic bounds of members of the union TYPE to static
2227 bounds. ADDR_STACK is a stack of struct property_addr_info
2228 to be used if needed during the dynamic resolution. */
2230 static struct type
*
2231 resolve_dynamic_union (struct type
*type
,
2232 struct property_addr_info
*addr_stack
)
2234 struct type
*resolved_type
;
2236 unsigned int max_len
= 0;
2238 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
2240 resolved_type
= copy_type (type
);
2241 TYPE_FIELDS (resolved_type
)
2242 = (struct field
*) TYPE_ALLOC (resolved_type
,
2243 TYPE_NFIELDS (resolved_type
)
2244 * sizeof (struct field
));
2245 memcpy (TYPE_FIELDS (resolved_type
),
2247 TYPE_NFIELDS (resolved_type
) * sizeof (struct field
));
2248 for (i
= 0; i
< TYPE_NFIELDS (resolved_type
); ++i
)
2252 if (field_is_static (&TYPE_FIELD (type
, i
)))
2255 t
= resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2257 TYPE_FIELD_TYPE (resolved_type
, i
) = t
;
2258 if (TYPE_LENGTH (t
) > max_len
)
2259 max_len
= TYPE_LENGTH (t
);
2262 TYPE_LENGTH (resolved_type
) = max_len
;
2263 return resolved_type
;
2266 /* See gdbtypes.h. */
2269 variant::matches (ULONGEST value
, bool is_unsigned
) const
2271 for (const discriminant_range
&range
: discriminants
)
2272 if (range
.contains (value
, is_unsigned
))
2278 compute_variant_fields_inner (struct type
*type
,
2279 struct property_addr_info
*addr_stack
,
2280 const variant_part
&part
,
2281 std::vector
<bool> &flags
);
2283 /* A helper function to determine which variant fields will be active.
2284 This handles both the variant's direct fields, and any variant
2285 parts embedded in this variant. TYPE is the type we're examining.
2286 ADDR_STACK holds information about the concrete object. VARIANT is
2287 the current variant to be handled. FLAGS is where the results are
2288 stored -- this function sets the Nth element in FLAGS if the
2289 corresponding field is enabled. ENABLED is whether this variant is
2293 compute_variant_fields_recurse (struct type
*type
,
2294 struct property_addr_info
*addr_stack
,
2295 const variant
&variant
,
2296 std::vector
<bool> &flags
,
2299 for (int field
= variant
.first_field
; field
< variant
.last_field
; ++field
)
2300 flags
[field
] = enabled
;
2302 for (const variant_part
&new_part
: variant
.parts
)
2305 compute_variant_fields_inner (type
, addr_stack
, new_part
, flags
);
2308 for (const auto &sub_variant
: new_part
.variants
)
2309 compute_variant_fields_recurse (type
, addr_stack
, sub_variant
,
2315 /* A helper function to determine which variant fields will be active.
2316 This evaluates the discriminant, decides which variant (if any) is
2317 active, and then updates FLAGS to reflect which fields should be
2318 available. TYPE is the type we're examining. ADDR_STACK holds
2319 information about the concrete object. VARIANT is the current
2320 variant to be handled. FLAGS is where the results are stored --
2321 this function sets the Nth element in FLAGS if the corresponding
2322 field is enabled. */
2325 compute_variant_fields_inner (struct type
*type
,
2326 struct property_addr_info
*addr_stack
,
2327 const variant_part
&part
,
2328 std::vector
<bool> &flags
)
2330 /* Evaluate the discriminant. */
2331 gdb::optional
<ULONGEST
> discr_value
;
2332 if (part
.discriminant_index
!= -1)
2334 int idx
= part
.discriminant_index
;
2336 if (TYPE_FIELD_LOC_KIND (type
, idx
) != FIELD_LOC_KIND_BITPOS
)
2337 error (_("Cannot determine struct field location"
2338 " (invalid location kind)"));
2340 if (addr_stack
->valaddr
.data () != NULL
)
2341 discr_value
= unpack_field_as_long (type
, addr_stack
->valaddr
.data (),
2345 CORE_ADDR addr
= (addr_stack
->addr
2346 + (TYPE_FIELD_BITPOS (type
, idx
)
2347 / TARGET_CHAR_BIT
));
2349 LONGEST bitsize
= TYPE_FIELD_BITSIZE (type
, idx
);
2350 LONGEST size
= bitsize
/ 8;
2352 size
= TYPE_LENGTH (TYPE_FIELD_TYPE (type
, idx
));
2354 gdb_byte bits
[sizeof (ULONGEST
)];
2355 read_memory (addr
, bits
, size
);
2357 LONGEST bitpos
= (TYPE_FIELD_BITPOS (type
, idx
)
2360 discr_value
= unpack_bits_as_long (TYPE_FIELD_TYPE (type
, idx
),
2361 bits
, bitpos
, bitsize
);
2365 /* Go through each variant and see which applies. */
2366 const variant
*default_variant
= nullptr;
2367 const variant
*applied_variant
= nullptr;
2368 for (const auto &variant
: part
.variants
)
2370 if (variant
.is_default ())
2371 default_variant
= &variant
;
2372 else if (discr_value
.has_value ()
2373 && variant
.matches (*discr_value
, part
.is_unsigned
))
2375 applied_variant
= &variant
;
2379 if (applied_variant
== nullptr)
2380 applied_variant
= default_variant
;
2382 for (const auto &variant
: part
.variants
)
2383 compute_variant_fields_recurse (type
, addr_stack
, variant
,
2384 flags
, applied_variant
== &variant
);
2387 /* Determine which variant fields are available in TYPE. The enabled
2388 fields are stored in RESOLVED_TYPE. ADDR_STACK holds information
2389 about the concrete object. PARTS describes the top-level variant
2390 parts for this type. */
2393 compute_variant_fields (struct type
*type
,
2394 struct type
*resolved_type
,
2395 struct property_addr_info
*addr_stack
,
2396 const gdb::array_view
<variant_part
> &parts
)
2398 /* Assume all fields are included by default. */
2399 std::vector
<bool> flags (TYPE_NFIELDS (resolved_type
), true);
2401 /* Now disable fields based on the variants that control them. */
2402 for (const auto &part
: parts
)
2403 compute_variant_fields_inner (type
, addr_stack
, part
, flags
);
2405 TYPE_NFIELDS (resolved_type
) = std::count (flags
.begin (), flags
.end (),
2407 TYPE_FIELDS (resolved_type
)
2408 = (struct field
*) TYPE_ALLOC (resolved_type
,
2409 TYPE_NFIELDS (resolved_type
)
2410 * sizeof (struct field
));
2412 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
2417 TYPE_FIELD (resolved_type
, out
) = TYPE_FIELD (type
, i
);
2422 /* Resolve dynamic bounds of members of the struct TYPE to static
2423 bounds. ADDR_STACK is a stack of struct property_addr_info to
2424 be used if needed during the dynamic resolution. */
2426 static struct type
*
2427 resolve_dynamic_struct (struct type
*type
,
2428 struct property_addr_info
*addr_stack
)
2430 struct type
*resolved_type
;
2432 unsigned resolved_type_bit_length
= 0;
2434 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
);
2435 gdb_assert (TYPE_NFIELDS (type
) > 0);
2437 resolved_type
= copy_type (type
);
2439 dynamic_prop
*variant_prop
= resolved_type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
2440 if (variant_prop
!= nullptr && variant_prop
->kind
== PROP_VARIANT_PARTS
)
2442 compute_variant_fields (type
, resolved_type
, addr_stack
,
2443 *variant_prop
->data
.variant_parts
);
2444 /* We want to leave the property attached, so that the Rust code
2445 can tell whether the type was originally an enum. */
2446 variant_prop
->kind
= PROP_TYPE
;
2447 variant_prop
->data
.original_type
= type
;
2451 TYPE_FIELDS (resolved_type
)
2452 = (struct field
*) TYPE_ALLOC (resolved_type
,
2453 TYPE_NFIELDS (resolved_type
)
2454 * sizeof (struct field
));
2455 memcpy (TYPE_FIELDS (resolved_type
),
2457 TYPE_NFIELDS (resolved_type
) * sizeof (struct field
));
2460 for (i
= 0; i
< TYPE_NFIELDS (resolved_type
); ++i
)
2462 unsigned new_bit_length
;
2463 struct property_addr_info pinfo
;
2465 if (field_is_static (&TYPE_FIELD (resolved_type
, i
)))
2468 if (TYPE_FIELD_LOC_KIND (resolved_type
, i
) == FIELD_LOC_KIND_DWARF_BLOCK
)
2470 struct dwarf2_property_baton baton
;
2472 = lookup_pointer_type (TYPE_FIELD_TYPE (resolved_type
, i
));
2473 baton
.locexpr
= *TYPE_FIELD_DWARF_BLOCK (resolved_type
, i
);
2475 struct dynamic_prop prop
;
2476 prop
.kind
= PROP_LOCEXPR
;
2477 prop
.data
.baton
= &baton
;
2480 if (dwarf2_evaluate_property (&prop
, nullptr, addr_stack
, &addr
,
2482 SET_FIELD_BITPOS (TYPE_FIELD (resolved_type
, i
),
2483 TARGET_CHAR_BIT
* (addr
- addr_stack
->addr
));
2486 /* As we know this field is not a static field, the field's
2487 field_loc_kind should be FIELD_LOC_KIND_BITPOS. Verify
2488 this is the case, but only trigger a simple error rather
2489 than an internal error if that fails. While failing
2490 that verification indicates a bug in our code, the error
2491 is not severe enough to suggest to the user he stops
2492 his debugging session because of it. */
2493 if (TYPE_FIELD_LOC_KIND (resolved_type
, i
) != FIELD_LOC_KIND_BITPOS
)
2494 error (_("Cannot determine struct field location"
2495 " (invalid location kind)"));
2497 pinfo
.type
= check_typedef (TYPE_FIELD_TYPE (resolved_type
, i
));
2498 pinfo
.valaddr
= addr_stack
->valaddr
;
2501 + (TYPE_FIELD_BITPOS (resolved_type
, i
) / TARGET_CHAR_BIT
));
2502 pinfo
.next
= addr_stack
;
2504 TYPE_FIELD_TYPE (resolved_type
, i
)
2505 = resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2507 gdb_assert (TYPE_FIELD_LOC_KIND (resolved_type
, i
)
2508 == FIELD_LOC_KIND_BITPOS
);
2510 new_bit_length
= TYPE_FIELD_BITPOS (resolved_type
, i
);
2511 if (TYPE_FIELD_BITSIZE (resolved_type
, i
) != 0)
2512 new_bit_length
+= TYPE_FIELD_BITSIZE (resolved_type
, i
);
2514 new_bit_length
+= (TYPE_LENGTH (TYPE_FIELD_TYPE (resolved_type
, i
))
2517 /* Normally, we would use the position and size of the last field
2518 to determine the size of the enclosing structure. But GCC seems
2519 to be encoding the position of some fields incorrectly when
2520 the struct contains a dynamic field that is not placed last.
2521 So we compute the struct size based on the field that has
2522 the highest position + size - probably the best we can do. */
2523 if (new_bit_length
> resolved_type_bit_length
)
2524 resolved_type_bit_length
= new_bit_length
;
2527 /* The length of a type won't change for fortran, but it does for C and Ada.
2528 For fortran the size of dynamic fields might change over time but not the
2529 type length of the structure. If we adapt it, we run into problems
2530 when calculating the element offset for arrays of structs. */
2531 if (current_language
->la_language
!= language_fortran
)
2532 TYPE_LENGTH (resolved_type
)
2533 = (resolved_type_bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2535 /* The Ada language uses this field as a cache for static fixed types: reset
2536 it as RESOLVED_TYPE must have its own static fixed type. */
2537 TYPE_TARGET_TYPE (resolved_type
) = NULL
;
2539 return resolved_type
;
2542 /* Worker for resolved_dynamic_type. */
2544 static struct type
*
2545 resolve_dynamic_type_internal (struct type
*type
,
2546 struct property_addr_info
*addr_stack
,
2549 struct type
*real_type
= check_typedef (type
);
2550 struct type
*resolved_type
= nullptr;
2551 struct dynamic_prop
*prop
;
2554 if (!is_dynamic_type_internal (real_type
, top_level
))
2557 gdb::optional
<CORE_ADDR
> type_length
;
2558 prop
= TYPE_DYNAMIC_LENGTH (type
);
2560 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2561 type_length
= value
;
2563 if (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2565 resolved_type
= copy_type (type
);
2566 TYPE_TARGET_TYPE (resolved_type
)
2567 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
), addr_stack
,
2572 /* Before trying to resolve TYPE, make sure it is not a stub. */
2575 switch (TYPE_CODE (type
))
2579 struct property_addr_info pinfo
;
2581 pinfo
.type
= check_typedef (TYPE_TARGET_TYPE (type
));
2583 if (addr_stack
->valaddr
.data () != NULL
)
2584 pinfo
.addr
= extract_typed_address (addr_stack
->valaddr
.data (),
2587 pinfo
.addr
= read_memory_typed_address (addr_stack
->addr
, type
);
2588 pinfo
.next
= addr_stack
;
2590 resolved_type
= copy_type (type
);
2591 TYPE_TARGET_TYPE (resolved_type
)
2592 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
),
2597 case TYPE_CODE_STRING
:
2598 /* Strings are very much like an array of characters, and can be
2599 treated as one here. */
2600 case TYPE_CODE_ARRAY
:
2601 resolved_type
= resolve_dynamic_array_or_string (type
, addr_stack
);
2604 case TYPE_CODE_RANGE
:
2605 resolved_type
= resolve_dynamic_range (type
, addr_stack
);
2608 case TYPE_CODE_UNION
:
2609 resolved_type
= resolve_dynamic_union (type
, addr_stack
);
2612 case TYPE_CODE_STRUCT
:
2613 resolved_type
= resolve_dynamic_struct (type
, addr_stack
);
2618 if (resolved_type
== nullptr)
2621 if (type_length
.has_value ())
2623 TYPE_LENGTH (resolved_type
) = *type_length
;
2624 remove_dyn_prop (DYN_PROP_BYTE_SIZE
, resolved_type
);
2627 /* Resolve data_location attribute. */
2628 prop
= TYPE_DATA_LOCATION (resolved_type
);
2630 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2632 TYPE_DYN_PROP_ADDR (prop
) = value
;
2633 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2636 return resolved_type
;
2639 /* See gdbtypes.h */
2642 resolve_dynamic_type (struct type
*type
,
2643 gdb::array_view
<const gdb_byte
> valaddr
,
2646 struct property_addr_info pinfo
2647 = {check_typedef (type
), valaddr
, addr
, NULL
};
2649 return resolve_dynamic_type_internal (type
, &pinfo
, 1);
2652 /* See gdbtypes.h */
2655 type::dyn_prop (dynamic_prop_node_kind prop_kind
) const
2657 dynamic_prop_list
*node
= TYPE_DYN_PROP_LIST (this);
2659 while (node
!= NULL
)
2661 if (node
->prop_kind
== prop_kind
)
2668 /* See gdbtypes.h */
2671 add_dyn_prop (enum dynamic_prop_node_kind prop_kind
, struct dynamic_prop prop
,
2674 struct dynamic_prop_list
*temp
;
2676 gdb_assert (TYPE_OBJFILE_OWNED (type
));
2678 temp
= XOBNEW (&TYPE_OBJFILE (type
)->objfile_obstack
,
2679 struct dynamic_prop_list
);
2680 temp
->prop_kind
= prop_kind
;
2682 temp
->next
= TYPE_DYN_PROP_LIST (type
);
2684 TYPE_DYN_PROP_LIST (type
) = temp
;
2687 /* Remove dynamic property from TYPE in case it exists. */
2690 remove_dyn_prop (enum dynamic_prop_node_kind prop_kind
,
2693 struct dynamic_prop_list
*prev_node
, *curr_node
;
2695 curr_node
= TYPE_DYN_PROP_LIST (type
);
2698 while (NULL
!= curr_node
)
2700 if (curr_node
->prop_kind
== prop_kind
)
2702 /* Update the linked list but don't free anything.
2703 The property was allocated on objstack and it is not known
2704 if we are on top of it. Nevertheless, everything is released
2705 when the complete objstack is freed. */
2706 if (NULL
== prev_node
)
2707 TYPE_DYN_PROP_LIST (type
) = curr_node
->next
;
2709 prev_node
->next
= curr_node
->next
;
2714 prev_node
= curr_node
;
2715 curr_node
= curr_node
->next
;
2719 /* Find the real type of TYPE. This function returns the real type,
2720 after removing all layers of typedefs, and completing opaque or stub
2721 types. Completion changes the TYPE argument, but stripping of
2724 Instance flags (e.g. const/volatile) are preserved as typedefs are
2725 stripped. If necessary a new qualified form of the underlying type
2728 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
2729 not been computed and we're either in the middle of reading symbols, or
2730 there was no name for the typedef in the debug info.
2732 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
2733 QUITs in the symbol reading code can also throw.
2734 Thus this function can throw an exception.
2736 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
2739 If this is a stubbed struct (i.e. declared as struct foo *), see if
2740 we can find a full definition in some other file. If so, copy this
2741 definition, so we can use it in future. There used to be a comment
2742 (but not any code) that if we don't find a full definition, we'd
2743 set a flag so we don't spend time in the future checking the same
2744 type. That would be a mistake, though--we might load in more
2745 symbols which contain a full definition for the type. */
2748 check_typedef (struct type
*type
)
2750 struct type
*orig_type
= type
;
2751 /* While we're removing typedefs, we don't want to lose qualifiers.
2752 E.g., const/volatile. */
2753 int instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2757 while (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2759 if (!TYPE_TARGET_TYPE (type
))
2764 /* It is dangerous to call lookup_symbol if we are currently
2765 reading a symtab. Infinite recursion is one danger. */
2766 if (currently_reading_symtab
)
2767 return make_qualified_type (type
, instance_flags
, NULL
);
2769 name
= TYPE_NAME (type
);
2770 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or
2771 VAR_DOMAIN as appropriate? */
2774 stub_noname_complaint ();
2775 return make_qualified_type (type
, instance_flags
, NULL
);
2777 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2779 TYPE_TARGET_TYPE (type
) = SYMBOL_TYPE (sym
);
2780 else /* TYPE_CODE_UNDEF */
2781 TYPE_TARGET_TYPE (type
) = alloc_type_arch (get_type_arch (type
));
2783 type
= TYPE_TARGET_TYPE (type
);
2785 /* Preserve the instance flags as we traverse down the typedef chain.
2787 Handling address spaces/classes is nasty, what do we do if there's a
2789 E.g., what if an outer typedef marks the type as class_1 and an inner
2790 typedef marks the type as class_2?
2791 This is the wrong place to do such error checking. We leave it to
2792 the code that created the typedef in the first place to flag the
2793 error. We just pick the outer address space (akin to letting the
2794 outer cast in a chain of casting win), instead of assuming
2795 "it can't happen". */
2797 const int ALL_SPACES
= (TYPE_INSTANCE_FLAG_CODE_SPACE
2798 | TYPE_INSTANCE_FLAG_DATA_SPACE
);
2799 const int ALL_CLASSES
= TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
;
2800 int new_instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2802 /* Treat code vs data spaces and address classes separately. */
2803 if ((instance_flags
& ALL_SPACES
) != 0)
2804 new_instance_flags
&= ~ALL_SPACES
;
2805 if ((instance_flags
& ALL_CLASSES
) != 0)
2806 new_instance_flags
&= ~ALL_CLASSES
;
2808 instance_flags
|= new_instance_flags
;
2812 /* If this is a struct/class/union with no fields, then check
2813 whether a full definition exists somewhere else. This is for
2814 systems where a type definition with no fields is issued for such
2815 types, instead of identifying them as stub types in the first
2818 if (TYPE_IS_OPAQUE (type
)
2819 && opaque_type_resolution
2820 && !currently_reading_symtab
)
2822 const char *name
= TYPE_NAME (type
);
2823 struct type
*newtype
;
2827 stub_noname_complaint ();
2828 return make_qualified_type (type
, instance_flags
, NULL
);
2830 newtype
= lookup_transparent_type (name
);
2834 /* If the resolved type and the stub are in the same
2835 objfile, then replace the stub type with the real deal.
2836 But if they're in separate objfiles, leave the stub
2837 alone; we'll just look up the transparent type every time
2838 we call check_typedef. We can't create pointers between
2839 types allocated to different objfiles, since they may
2840 have different lifetimes. Trying to copy NEWTYPE over to
2841 TYPE's objfile is pointless, too, since you'll have to
2842 move over any other types NEWTYPE refers to, which could
2843 be an unbounded amount of stuff. */
2844 if (TYPE_OBJFILE (newtype
) == TYPE_OBJFILE (type
))
2845 type
= make_qualified_type (newtype
,
2846 TYPE_INSTANCE_FLAGS (type
),
2852 /* Otherwise, rely on the stub flag being set for opaque/stubbed
2854 else if (TYPE_STUB (type
) && !currently_reading_symtab
)
2856 const char *name
= TYPE_NAME (type
);
2857 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or VAR_DOMAIN
2863 stub_noname_complaint ();
2864 return make_qualified_type (type
, instance_flags
, NULL
);
2866 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2869 /* Same as above for opaque types, we can replace the stub
2870 with the complete type only if they are in the same
2872 if (TYPE_OBJFILE (SYMBOL_TYPE(sym
)) == TYPE_OBJFILE (type
))
2873 type
= make_qualified_type (SYMBOL_TYPE (sym
),
2874 TYPE_INSTANCE_FLAGS (type
),
2877 type
= SYMBOL_TYPE (sym
);
2881 if (TYPE_TARGET_STUB (type
))
2883 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
2885 if (TYPE_STUB (target_type
) || TYPE_TARGET_STUB (target_type
))
2887 /* Nothing we can do. */
2889 else if (TYPE_CODE (type
) == TYPE_CODE_RANGE
)
2891 TYPE_LENGTH (type
) = TYPE_LENGTH (target_type
);
2892 TYPE_TARGET_STUB (type
) = 0;
2894 else if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
2895 && update_static_array_size (type
))
2896 TYPE_TARGET_STUB (type
) = 0;
2899 type
= make_qualified_type (type
, instance_flags
, NULL
);
2901 /* Cache TYPE_LENGTH for future use. */
2902 TYPE_LENGTH (orig_type
) = TYPE_LENGTH (type
);
2907 /* Parse a type expression in the string [P..P+LENGTH). If an error
2908 occurs, silently return a void type. */
2910 static struct type
*
2911 safe_parse_type (struct gdbarch
*gdbarch
, char *p
, int length
)
2913 struct ui_file
*saved_gdb_stderr
;
2914 struct type
*type
= NULL
; /* Initialize to keep gcc happy. */
2916 /* Suppress error messages. */
2917 saved_gdb_stderr
= gdb_stderr
;
2918 gdb_stderr
= &null_stream
;
2920 /* Call parse_and_eval_type() without fear of longjmp()s. */
2923 type
= parse_and_eval_type (p
, length
);
2925 catch (const gdb_exception_error
&except
)
2927 type
= builtin_type (gdbarch
)->builtin_void
;
2930 /* Stop suppressing error messages. */
2931 gdb_stderr
= saved_gdb_stderr
;
2936 /* Ugly hack to convert method stubs into method types.
2938 He ain't kiddin'. This demangles the name of the method into a
2939 string including argument types, parses out each argument type,
2940 generates a string casting a zero to that type, evaluates the
2941 string, and stuffs the resulting type into an argtype vector!!!
2942 Then it knows the type of the whole function (including argument
2943 types for overloading), which info used to be in the stab's but was
2944 removed to hack back the space required for them. */
2947 check_stub_method (struct type
*type
, int method_id
, int signature_id
)
2949 struct gdbarch
*gdbarch
= get_type_arch (type
);
2951 char *mangled_name
= gdb_mangle_name (type
, method_id
, signature_id
);
2952 char *demangled_name
= gdb_demangle (mangled_name
,
2953 DMGL_PARAMS
| DMGL_ANSI
);
2954 char *argtypetext
, *p
;
2955 int depth
= 0, argcount
= 1;
2956 struct field
*argtypes
;
2959 /* Make sure we got back a function string that we can use. */
2961 p
= strchr (demangled_name
, '(');
2965 if (demangled_name
== NULL
|| p
== NULL
)
2966 error (_("Internal: Cannot demangle mangled name `%s'."),
2969 /* Now, read in the parameters that define this type. */
2974 if (*p
== '(' || *p
== '<')
2978 else if (*p
== ')' || *p
== '>')
2982 else if (*p
== ',' && depth
== 0)
2990 /* If we read one argument and it was ``void'', don't count it. */
2991 if (startswith (argtypetext
, "(void)"))
2994 /* We need one extra slot, for the THIS pointer. */
2996 argtypes
= (struct field
*)
2997 TYPE_ALLOC (type
, (argcount
+ 1) * sizeof (struct field
));
3000 /* Add THIS pointer for non-static methods. */
3001 f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3002 if (TYPE_FN_FIELD_STATIC_P (f
, signature_id
))
3006 argtypes
[0].type
= lookup_pointer_type (type
);
3010 if (*p
!= ')') /* () means no args, skip while. */
3015 if (depth
<= 0 && (*p
== ',' || *p
== ')'))
3017 /* Avoid parsing of ellipsis, they will be handled below.
3018 Also avoid ``void'' as above. */
3019 if (strncmp (argtypetext
, "...", p
- argtypetext
) != 0
3020 && strncmp (argtypetext
, "void", p
- argtypetext
) != 0)
3022 argtypes
[argcount
].type
=
3023 safe_parse_type (gdbarch
, argtypetext
, p
- argtypetext
);
3026 argtypetext
= p
+ 1;
3029 if (*p
== '(' || *p
== '<')
3033 else if (*p
== ')' || *p
== '>')
3042 TYPE_FN_FIELD_PHYSNAME (f
, signature_id
) = mangled_name
;
3044 /* Now update the old "stub" type into a real type. */
3045 mtype
= TYPE_FN_FIELD_TYPE (f
, signature_id
);
3046 /* MTYPE may currently be a function (TYPE_CODE_FUNC).
3047 We want a method (TYPE_CODE_METHOD). */
3048 smash_to_method_type (mtype
, type
, TYPE_TARGET_TYPE (mtype
),
3049 argtypes
, argcount
, p
[-2] == '.');
3050 TYPE_STUB (mtype
) = 0;
3051 TYPE_FN_FIELD_STUB (f
, signature_id
) = 0;
3053 xfree (demangled_name
);
3056 /* This is the external interface to check_stub_method, above. This
3057 function unstubs all of the signatures for TYPE's METHOD_ID method
3058 name. After calling this function TYPE_FN_FIELD_STUB will be
3059 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
3062 This function unfortunately can not die until stabs do. */
3065 check_stub_method_group (struct type
*type
, int method_id
)
3067 int len
= TYPE_FN_FIELDLIST_LENGTH (type
, method_id
);
3068 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3070 for (int j
= 0; j
< len
; j
++)
3072 if (TYPE_FN_FIELD_STUB (f
, j
))
3073 check_stub_method (type
, method_id
, j
);
3077 /* Ensure it is in .rodata (if available) by working around GCC PR 44690. */
3078 const struct cplus_struct_type cplus_struct_default
= { };
3081 allocate_cplus_struct_type (struct type
*type
)
3083 if (HAVE_CPLUS_STRUCT (type
))
3084 /* Structure was already allocated. Nothing more to do. */
3087 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_CPLUS_STUFF
;
3088 TYPE_RAW_CPLUS_SPECIFIC (type
) = (struct cplus_struct_type
*)
3089 TYPE_ALLOC (type
, sizeof (struct cplus_struct_type
));
3090 *(TYPE_RAW_CPLUS_SPECIFIC (type
)) = cplus_struct_default
;
3091 set_type_vptr_fieldno (type
, -1);
3094 const struct gnat_aux_type gnat_aux_default
=
3097 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
3098 and allocate the associated gnat-specific data. The gnat-specific
3099 data is also initialized to gnat_aux_default. */
3102 allocate_gnat_aux_type (struct type
*type
)
3104 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_GNAT_STUFF
;
3105 TYPE_GNAT_SPECIFIC (type
) = (struct gnat_aux_type
*)
3106 TYPE_ALLOC (type
, sizeof (struct gnat_aux_type
));
3107 *(TYPE_GNAT_SPECIFIC (type
)) = gnat_aux_default
;
3110 /* Helper function to initialize a newly allocated type. Set type code
3111 to CODE and initialize the type-specific fields accordingly. */
3114 set_type_code (struct type
*type
, enum type_code code
)
3116 TYPE_CODE (type
) = code
;
3120 case TYPE_CODE_STRUCT
:
3121 case TYPE_CODE_UNION
:
3122 case TYPE_CODE_NAMESPACE
:
3123 INIT_CPLUS_SPECIFIC (type
);
3126 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_FLOATFORMAT
;
3128 case TYPE_CODE_FUNC
:
3129 INIT_FUNC_SPECIFIC (type
);
3134 /* Helper function to verify floating-point format and size.
3135 BIT is the type size in bits; if BIT equals -1, the size is
3136 determined by the floatformat. Returns size to be used. */
3139 verify_floatformat (int bit
, const struct floatformat
*floatformat
)
3141 gdb_assert (floatformat
!= NULL
);
3144 bit
= floatformat
->totalsize
;
3146 gdb_assert (bit
>= 0);
3147 gdb_assert (bit
>= floatformat
->totalsize
);
3152 /* Return the floating-point format for a floating-point variable of
3155 const struct floatformat
*
3156 floatformat_from_type (const struct type
*type
)
3158 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_FLT
);
3159 gdb_assert (TYPE_FLOATFORMAT (type
));
3160 return TYPE_FLOATFORMAT (type
);
3163 /* Helper function to initialize the standard scalar types.
3165 If NAME is non-NULL, then it is used to initialize the type name.
3166 Note that NAME is not copied; it is required to have a lifetime at
3167 least as long as OBJFILE. */
3170 init_type (struct objfile
*objfile
, enum type_code code
, int bit
,
3175 type
= alloc_type (objfile
);
3176 set_type_code (type
, code
);
3177 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
3178 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
3179 TYPE_NAME (type
) = name
;
3184 /* Allocate a TYPE_CODE_ERROR type structure associated with OBJFILE,
3185 to use with variables that have no debug info. NAME is the type
3188 static struct type
*
3189 init_nodebug_var_type (struct objfile
*objfile
, const char *name
)
3191 return init_type (objfile
, TYPE_CODE_ERROR
, 0, name
);
3194 /* Allocate a TYPE_CODE_INT type structure associated with OBJFILE.
3195 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3196 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3199 init_integer_type (struct objfile
*objfile
,
3200 int bit
, int unsigned_p
, const char *name
)
3204 t
= init_type (objfile
, TYPE_CODE_INT
, bit
, name
);
3206 TYPE_UNSIGNED (t
) = 1;
3211 /* Allocate a TYPE_CODE_CHAR type structure associated with OBJFILE.
3212 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3213 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3216 init_character_type (struct objfile
*objfile
,
3217 int bit
, int unsigned_p
, const char *name
)
3221 t
= init_type (objfile
, TYPE_CODE_CHAR
, bit
, name
);
3223 TYPE_UNSIGNED (t
) = 1;
3228 /* Allocate a TYPE_CODE_BOOL type structure associated with OBJFILE.
3229 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3230 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3233 init_boolean_type (struct objfile
*objfile
,
3234 int bit
, int unsigned_p
, const char *name
)
3238 t
= init_type (objfile
, TYPE_CODE_BOOL
, bit
, name
);
3240 TYPE_UNSIGNED (t
) = 1;
3245 /* Allocate a TYPE_CODE_FLT type structure associated with OBJFILE.
3246 BIT is the type size in bits; if BIT equals -1, the size is
3247 determined by the floatformat. NAME is the type name. Set the
3248 TYPE_FLOATFORMAT from FLOATFORMATS. BYTE_ORDER is the byte order
3249 to use. If it is BFD_ENDIAN_UNKNOWN (the default), then the byte
3250 order of the objfile's architecture is used. */
3253 init_float_type (struct objfile
*objfile
,
3254 int bit
, const char *name
,
3255 const struct floatformat
**floatformats
,
3256 enum bfd_endian byte_order
)
3258 if (byte_order
== BFD_ENDIAN_UNKNOWN
)
3260 struct gdbarch
*gdbarch
= objfile
->arch ();
3261 byte_order
= gdbarch_byte_order (gdbarch
);
3263 const struct floatformat
*fmt
= floatformats
[byte_order
];
3266 bit
= verify_floatformat (bit
, fmt
);
3267 t
= init_type (objfile
, TYPE_CODE_FLT
, bit
, name
);
3268 TYPE_FLOATFORMAT (t
) = fmt
;
3273 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with OBJFILE.
3274 BIT is the type size in bits. NAME is the type name. */
3277 init_decfloat_type (struct objfile
*objfile
, int bit
, const char *name
)
3281 t
= init_type (objfile
, TYPE_CODE_DECFLOAT
, bit
, name
);
3285 /* Allocate a TYPE_CODE_COMPLEX type structure. NAME is the type
3286 name. TARGET_TYPE is the component type. */
3289 init_complex_type (const char *name
, struct type
*target_type
)
3293 gdb_assert (TYPE_CODE (target_type
) == TYPE_CODE_INT
3294 || TYPE_CODE (target_type
) == TYPE_CODE_FLT
);
3296 if (TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
== nullptr)
3298 if (name
== nullptr)
3301 = (char *) TYPE_ALLOC (target_type
,
3302 strlen (TYPE_NAME (target_type
))
3303 + strlen ("_Complex ") + 1);
3304 strcpy (new_name
, "_Complex ");
3305 strcat (new_name
, TYPE_NAME (target_type
));
3309 t
= alloc_type_copy (target_type
);
3310 set_type_code (t
, TYPE_CODE_COMPLEX
);
3311 TYPE_LENGTH (t
) = 2 * TYPE_LENGTH (target_type
);
3312 TYPE_NAME (t
) = name
;
3314 TYPE_TARGET_TYPE (t
) = target_type
;
3315 TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
= t
;
3318 return TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
;
3321 /* Allocate a TYPE_CODE_PTR type structure associated with OBJFILE.
3322 BIT is the pointer type size in bits. NAME is the type name.
3323 TARGET_TYPE is the pointer target type. Always sets the pointer type's
3324 TYPE_UNSIGNED flag. */
3327 init_pointer_type (struct objfile
*objfile
,
3328 int bit
, const char *name
, struct type
*target_type
)
3332 t
= init_type (objfile
, TYPE_CODE_PTR
, bit
, name
);
3333 TYPE_TARGET_TYPE (t
) = target_type
;
3334 TYPE_UNSIGNED (t
) = 1;
3338 /* See gdbtypes.h. */
3341 type_raw_align (struct type
*type
)
3343 if (type
->align_log2
!= 0)
3344 return 1 << (type
->align_log2
- 1);
3348 /* See gdbtypes.h. */
3351 type_align (struct type
*type
)
3353 /* Check alignment provided in the debug information. */
3354 unsigned raw_align
= type_raw_align (type
);
3358 /* Allow the architecture to provide an alignment. */
3359 struct gdbarch
*arch
= get_type_arch (type
);
3360 ULONGEST align
= gdbarch_type_align (arch
, type
);
3364 switch (TYPE_CODE (type
))
3367 case TYPE_CODE_FUNC
:
3368 case TYPE_CODE_FLAGS
:
3370 case TYPE_CODE_RANGE
:
3372 case TYPE_CODE_ENUM
:
3374 case TYPE_CODE_RVALUE_REF
:
3375 case TYPE_CODE_CHAR
:
3376 case TYPE_CODE_BOOL
:
3377 case TYPE_CODE_DECFLOAT
:
3378 case TYPE_CODE_METHODPTR
:
3379 case TYPE_CODE_MEMBERPTR
:
3380 align
= type_length_units (check_typedef (type
));
3383 case TYPE_CODE_ARRAY
:
3384 case TYPE_CODE_COMPLEX
:
3385 case TYPE_CODE_TYPEDEF
:
3386 align
= type_align (TYPE_TARGET_TYPE (type
));
3389 case TYPE_CODE_STRUCT
:
3390 case TYPE_CODE_UNION
:
3392 int number_of_non_static_fields
= 0;
3393 for (unsigned i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
3395 if (!field_is_static (&TYPE_FIELD (type
, i
)))
3397 number_of_non_static_fields
++;
3398 ULONGEST f_align
= type_align (TYPE_FIELD_TYPE (type
, i
));
3401 /* Don't pretend we know something we don't. */
3405 if (f_align
> align
)
3409 /* A struct with no fields, or with only static fields has an
3411 if (number_of_non_static_fields
== 0)
3417 case TYPE_CODE_STRING
:
3418 /* Not sure what to do here, and these can't appear in C or C++
3422 case TYPE_CODE_VOID
:
3426 case TYPE_CODE_ERROR
:
3427 case TYPE_CODE_METHOD
:
3432 if ((align
& (align
- 1)) != 0)
3434 /* Not a power of 2, so pass. */
3441 /* See gdbtypes.h. */
3444 set_type_align (struct type
*type
, ULONGEST align
)
3446 /* Must be a power of 2. Zero is ok. */
3447 gdb_assert ((align
& (align
- 1)) == 0);
3449 unsigned result
= 0;
3456 if (result
>= (1 << TYPE_ALIGN_BITS
))
3459 type
->align_log2
= result
;
3464 /* Queries on types. */
3467 can_dereference (struct type
*t
)
3469 /* FIXME: Should we return true for references as well as
3471 t
= check_typedef (t
);
3474 && TYPE_CODE (t
) == TYPE_CODE_PTR
3475 && TYPE_CODE (TYPE_TARGET_TYPE (t
)) != TYPE_CODE_VOID
);
3479 is_integral_type (struct type
*t
)
3481 t
= check_typedef (t
);
3484 && ((TYPE_CODE (t
) == TYPE_CODE_INT
)
3485 || (TYPE_CODE (t
) == TYPE_CODE_ENUM
)
3486 || (TYPE_CODE (t
) == TYPE_CODE_FLAGS
)
3487 || (TYPE_CODE (t
) == TYPE_CODE_CHAR
)
3488 || (TYPE_CODE (t
) == TYPE_CODE_RANGE
)
3489 || (TYPE_CODE (t
) == TYPE_CODE_BOOL
)));
3493 is_floating_type (struct type
*t
)
3495 t
= check_typedef (t
);
3498 && ((TYPE_CODE (t
) == TYPE_CODE_FLT
)
3499 || (TYPE_CODE (t
) == TYPE_CODE_DECFLOAT
)));
3502 /* Return true if TYPE is scalar. */
3505 is_scalar_type (struct type
*type
)
3507 type
= check_typedef (type
);
3509 switch (TYPE_CODE (type
))
3511 case TYPE_CODE_ARRAY
:
3512 case TYPE_CODE_STRUCT
:
3513 case TYPE_CODE_UNION
:
3515 case TYPE_CODE_STRING
:
3522 /* Return true if T is scalar, or a composite type which in practice has
3523 the memory layout of a scalar type. E.g., an array or struct with only
3524 one scalar element inside it, or a union with only scalar elements. */
3527 is_scalar_type_recursive (struct type
*t
)
3529 t
= check_typedef (t
);
3531 if (is_scalar_type (t
))
3533 /* Are we dealing with an array or string of known dimensions? */
3534 else if ((TYPE_CODE (t
) == TYPE_CODE_ARRAY
3535 || TYPE_CODE (t
) == TYPE_CODE_STRING
) && TYPE_NFIELDS (t
) == 1
3536 && TYPE_CODE (TYPE_INDEX_TYPE (t
)) == TYPE_CODE_RANGE
)
3538 LONGEST low_bound
, high_bound
;
3539 struct type
*elt_type
= check_typedef (TYPE_TARGET_TYPE (t
));
3541 get_discrete_bounds (TYPE_INDEX_TYPE (t
), &low_bound
, &high_bound
);
3543 return high_bound
== low_bound
&& is_scalar_type_recursive (elt_type
);
3545 /* Are we dealing with a struct with one element? */
3546 else if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
&& TYPE_NFIELDS (t
) == 1)
3547 return is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, 0));
3548 else if (TYPE_CODE (t
) == TYPE_CODE_UNION
)
3550 int i
, n
= TYPE_NFIELDS (t
);
3552 /* If all elements of the union are scalar, then the union is scalar. */
3553 for (i
= 0; i
< n
; i
++)
3554 if (!is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, i
)))
3563 /* Return true is T is a class or a union. False otherwise. */
3566 class_or_union_p (const struct type
*t
)
3568 return (TYPE_CODE (t
) == TYPE_CODE_STRUCT
3569 || TYPE_CODE (t
) == TYPE_CODE_UNION
);
3572 /* A helper function which returns true if types A and B represent the
3573 "same" class type. This is true if the types have the same main
3574 type, or the same name. */
3577 class_types_same_p (const struct type
*a
, const struct type
*b
)
3579 return (TYPE_MAIN_TYPE (a
) == TYPE_MAIN_TYPE (b
)
3580 || (TYPE_NAME (a
) && TYPE_NAME (b
)
3581 && !strcmp (TYPE_NAME (a
), TYPE_NAME (b
))));
3584 /* If BASE is an ancestor of DCLASS return the distance between them.
3585 otherwise return -1;
3589 class B: public A {};
3590 class C: public B {};
3593 distance_to_ancestor (A, A, 0) = 0
3594 distance_to_ancestor (A, B, 0) = 1
3595 distance_to_ancestor (A, C, 0) = 2
3596 distance_to_ancestor (A, D, 0) = 3
3598 If PUBLIC is 1 then only public ancestors are considered,
3599 and the function returns the distance only if BASE is a public ancestor
3603 distance_to_ancestor (A, D, 1) = -1. */
3606 distance_to_ancestor (struct type
*base
, struct type
*dclass
, int is_public
)
3611 base
= check_typedef (base
);
3612 dclass
= check_typedef (dclass
);
3614 if (class_types_same_p (base
, dclass
))
3617 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
); i
++)
3619 if (is_public
&& ! BASETYPE_VIA_PUBLIC (dclass
, i
))
3622 d
= distance_to_ancestor (base
, TYPE_BASECLASS (dclass
, i
), is_public
);
3630 /* Check whether BASE is an ancestor or base class or DCLASS
3631 Return 1 if so, and 0 if not.
3632 Note: If BASE and DCLASS are of the same type, this function
3633 will return 1. So for some class A, is_ancestor (A, A) will
3637 is_ancestor (struct type
*base
, struct type
*dclass
)
3639 return distance_to_ancestor (base
, dclass
, 0) >= 0;
3642 /* Like is_ancestor, but only returns true when BASE is a public
3643 ancestor of DCLASS. */
3646 is_public_ancestor (struct type
*base
, struct type
*dclass
)
3648 return distance_to_ancestor (base
, dclass
, 1) >= 0;
3651 /* A helper function for is_unique_ancestor. */
3654 is_unique_ancestor_worker (struct type
*base
, struct type
*dclass
,
3656 const gdb_byte
*valaddr
, int embedded_offset
,
3657 CORE_ADDR address
, struct value
*val
)
3661 base
= check_typedef (base
);
3662 dclass
= check_typedef (dclass
);
3664 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
) && count
< 2; ++i
)
3669 iter
= check_typedef (TYPE_BASECLASS (dclass
, i
));
3671 this_offset
= baseclass_offset (dclass
, i
, valaddr
, embedded_offset
,
3674 if (class_types_same_p (base
, iter
))
3676 /* If this is the first subclass, set *OFFSET and set count
3677 to 1. Otherwise, if this is at the same offset as
3678 previous instances, do nothing. Otherwise, increment
3682 *offset
= this_offset
;
3685 else if (this_offset
== *offset
)
3693 count
+= is_unique_ancestor_worker (base
, iter
, offset
,
3695 embedded_offset
+ this_offset
,
3702 /* Like is_ancestor, but only returns true if BASE is a unique base
3703 class of the type of VAL. */
3706 is_unique_ancestor (struct type
*base
, struct value
*val
)
3710 return is_unique_ancestor_worker (base
, value_type (val
), &offset
,
3711 value_contents_for_printing (val
),
3712 value_embedded_offset (val
),
3713 value_address (val
), val
) == 1;
3716 /* See gdbtypes.h. */
3719 type_byte_order (const struct type
*type
)
3721 bfd_endian byteorder
= gdbarch_byte_order (get_type_arch (type
));
3722 if (TYPE_ENDIANITY_NOT_DEFAULT (type
))
3724 if (byteorder
== BFD_ENDIAN_BIG
)
3725 return BFD_ENDIAN_LITTLE
;
3728 gdb_assert (byteorder
== BFD_ENDIAN_LITTLE
);
3729 return BFD_ENDIAN_BIG
;
3737 /* Overload resolution. */
3739 /* Return the sum of the rank of A with the rank of B. */
3742 sum_ranks (struct rank a
, struct rank b
)
3745 c
.rank
= a
.rank
+ b
.rank
;
3746 c
.subrank
= a
.subrank
+ b
.subrank
;
3750 /* Compare rank A and B and return:
3752 1 if a is better than b
3753 -1 if b is better than a. */
3756 compare_ranks (struct rank a
, struct rank b
)
3758 if (a
.rank
== b
.rank
)
3760 if (a
.subrank
== b
.subrank
)
3762 if (a
.subrank
< b
.subrank
)
3764 if (a
.subrank
> b
.subrank
)
3768 if (a
.rank
< b
.rank
)
3771 /* a.rank > b.rank */
3775 /* Functions for overload resolution begin here. */
3777 /* Compare two badness vectors A and B and return the result.
3778 0 => A and B are identical
3779 1 => A and B are incomparable
3780 2 => A is better than B
3781 3 => A is worse than B */
3784 compare_badness (const badness_vector
&a
, const badness_vector
&b
)
3788 short found_pos
= 0; /* any positives in c? */
3789 short found_neg
= 0; /* any negatives in c? */
3791 /* differing sizes => incomparable */
3792 if (a
.size () != b
.size ())
3795 /* Subtract b from a */
3796 for (i
= 0; i
< a
.size (); i
++)
3798 tmp
= compare_ranks (b
[i
], a
[i
]);
3808 return 1; /* incomparable */
3810 return 3; /* A > B */
3816 return 2; /* A < B */
3818 return 0; /* A == B */
3822 /* Rank a function by comparing its parameter types (PARMS), to the
3823 types of an argument list (ARGS). Return the badness vector. This
3824 has ARGS.size() + 1 entries. */
3827 rank_function (gdb::array_view
<type
*> parms
,
3828 gdb::array_view
<value
*> args
)
3830 /* add 1 for the length-match rank. */
3832 bv
.reserve (1 + args
.size ());
3834 /* First compare the lengths of the supplied lists.
3835 If there is a mismatch, set it to a high value. */
3837 /* pai/1997-06-03 FIXME: when we have debug info about default
3838 arguments and ellipsis parameter lists, we should consider those
3839 and rank the length-match more finely. */
3841 bv
.push_back ((args
.size () != parms
.size ())
3842 ? LENGTH_MISMATCH_BADNESS
3843 : EXACT_MATCH_BADNESS
);
3845 /* Now rank all the parameters of the candidate function. */
3846 size_t min_len
= std::min (parms
.size (), args
.size ());
3848 for (size_t i
= 0; i
< min_len
; i
++)
3849 bv
.push_back (rank_one_type (parms
[i
], value_type (args
[i
]),
3852 /* If more arguments than parameters, add dummy entries. */
3853 for (size_t i
= min_len
; i
< args
.size (); i
++)
3854 bv
.push_back (TOO_FEW_PARAMS_BADNESS
);
3859 /* Compare the names of two integer types, assuming that any sign
3860 qualifiers have been checked already. We do it this way because
3861 there may be an "int" in the name of one of the types. */
3864 integer_types_same_name_p (const char *first
, const char *second
)
3866 int first_p
, second_p
;
3868 /* If both are shorts, return 1; if neither is a short, keep
3870 first_p
= (strstr (first
, "short") != NULL
);
3871 second_p
= (strstr (second
, "short") != NULL
);
3872 if (first_p
&& second_p
)
3874 if (first_p
|| second_p
)
3877 /* Likewise for long. */
3878 first_p
= (strstr (first
, "long") != NULL
);
3879 second_p
= (strstr (second
, "long") != NULL
);
3880 if (first_p
&& second_p
)
3882 if (first_p
|| second_p
)
3885 /* Likewise for char. */
3886 first_p
= (strstr (first
, "char") != NULL
);
3887 second_p
= (strstr (second
, "char") != NULL
);
3888 if (first_p
&& second_p
)
3890 if (first_p
|| second_p
)
3893 /* They must both be ints. */
3897 /* Compares type A to type B. Returns true if they represent the same
3898 type, false otherwise. */
3901 types_equal (struct type
*a
, struct type
*b
)
3903 /* Identical type pointers. */
3904 /* However, this still doesn't catch all cases of same type for b
3905 and a. The reason is that builtin types are different from
3906 the same ones constructed from the object. */
3910 /* Resolve typedefs */
3911 if (TYPE_CODE (a
) == TYPE_CODE_TYPEDEF
)
3912 a
= check_typedef (a
);
3913 if (TYPE_CODE (b
) == TYPE_CODE_TYPEDEF
)
3914 b
= check_typedef (b
);
3916 /* If after resolving typedefs a and b are not of the same type
3917 code then they are not equal. */
3918 if (TYPE_CODE (a
) != TYPE_CODE (b
))
3921 /* If a and b are both pointers types or both reference types then
3922 they are equal of the same type iff the objects they refer to are
3923 of the same type. */
3924 if (TYPE_CODE (a
) == TYPE_CODE_PTR
3925 || TYPE_CODE (a
) == TYPE_CODE_REF
)
3926 return types_equal (TYPE_TARGET_TYPE (a
),
3927 TYPE_TARGET_TYPE (b
));
3929 /* Well, damnit, if the names are exactly the same, I'll say they
3930 are exactly the same. This happens when we generate method
3931 stubs. The types won't point to the same address, but they
3932 really are the same. */
3934 if (TYPE_NAME (a
) && TYPE_NAME (b
)
3935 && strcmp (TYPE_NAME (a
), TYPE_NAME (b
)) == 0)
3938 /* Check if identical after resolving typedefs. */
3942 /* Two function types are equal if their argument and return types
3944 if (TYPE_CODE (a
) == TYPE_CODE_FUNC
)
3948 if (TYPE_NFIELDS (a
) != TYPE_NFIELDS (b
))
3951 if (!types_equal (TYPE_TARGET_TYPE (a
), TYPE_TARGET_TYPE (b
)))
3954 for (i
= 0; i
< TYPE_NFIELDS (a
); ++i
)
3955 if (!types_equal (TYPE_FIELD_TYPE (a
, i
), TYPE_FIELD_TYPE (b
, i
)))
3964 /* Deep comparison of types. */
3966 /* An entry in the type-equality bcache. */
3968 struct type_equality_entry
3970 type_equality_entry (struct type
*t1
, struct type
*t2
)
3976 struct type
*type1
, *type2
;
3979 /* A helper function to compare two strings. Returns true if they are
3980 the same, false otherwise. Handles NULLs properly. */
3983 compare_maybe_null_strings (const char *s
, const char *t
)
3985 if (s
== NULL
|| t
== NULL
)
3987 return strcmp (s
, t
) == 0;
3990 /* A helper function for check_types_worklist that checks two types for
3991 "deep" equality. Returns true if the types are considered the
3992 same, false otherwise. */
3995 check_types_equal (struct type
*type1
, struct type
*type2
,
3996 std::vector
<type_equality_entry
> *worklist
)
3998 type1
= check_typedef (type1
);
3999 type2
= check_typedef (type2
);
4004 if (TYPE_CODE (type1
) != TYPE_CODE (type2
)
4005 || TYPE_LENGTH (type1
) != TYPE_LENGTH (type2
)
4006 || TYPE_UNSIGNED (type1
) != TYPE_UNSIGNED (type2
)
4007 || TYPE_NOSIGN (type1
) != TYPE_NOSIGN (type2
)
4008 || TYPE_ENDIANITY_NOT_DEFAULT (type1
) != TYPE_ENDIANITY_NOT_DEFAULT (type2
)
4009 || TYPE_VARARGS (type1
) != TYPE_VARARGS (type2
)
4010 || TYPE_VECTOR (type1
) != TYPE_VECTOR (type2
)
4011 || TYPE_NOTTEXT (type1
) != TYPE_NOTTEXT (type2
)
4012 || TYPE_INSTANCE_FLAGS (type1
) != TYPE_INSTANCE_FLAGS (type2
)
4013 || TYPE_NFIELDS (type1
) != TYPE_NFIELDS (type2
))
4016 if (!compare_maybe_null_strings (TYPE_NAME (type1
), TYPE_NAME (type2
)))
4018 if (!compare_maybe_null_strings (TYPE_NAME (type1
), TYPE_NAME (type2
)))
4021 if (TYPE_CODE (type1
) == TYPE_CODE_RANGE
)
4023 if (*TYPE_RANGE_DATA (type1
) != *TYPE_RANGE_DATA (type2
))
4030 for (i
= 0; i
< TYPE_NFIELDS (type1
); ++i
)
4032 const struct field
*field1
= &TYPE_FIELD (type1
, i
);
4033 const struct field
*field2
= &TYPE_FIELD (type2
, i
);
4035 if (FIELD_ARTIFICIAL (*field1
) != FIELD_ARTIFICIAL (*field2
)
4036 || FIELD_BITSIZE (*field1
) != FIELD_BITSIZE (*field2
)
4037 || FIELD_LOC_KIND (*field1
) != FIELD_LOC_KIND (*field2
))
4039 if (!compare_maybe_null_strings (FIELD_NAME (*field1
),
4040 FIELD_NAME (*field2
)))
4042 switch (FIELD_LOC_KIND (*field1
))
4044 case FIELD_LOC_KIND_BITPOS
:
4045 if (FIELD_BITPOS (*field1
) != FIELD_BITPOS (*field2
))
4048 case FIELD_LOC_KIND_ENUMVAL
:
4049 if (FIELD_ENUMVAL (*field1
) != FIELD_ENUMVAL (*field2
))
4052 case FIELD_LOC_KIND_PHYSADDR
:
4053 if (FIELD_STATIC_PHYSADDR (*field1
)
4054 != FIELD_STATIC_PHYSADDR (*field2
))
4057 case FIELD_LOC_KIND_PHYSNAME
:
4058 if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1
),
4059 FIELD_STATIC_PHYSNAME (*field2
)))
4062 case FIELD_LOC_KIND_DWARF_BLOCK
:
4064 struct dwarf2_locexpr_baton
*block1
, *block2
;
4066 block1
= FIELD_DWARF_BLOCK (*field1
);
4067 block2
= FIELD_DWARF_BLOCK (*field2
);
4068 if (block1
->per_cu
!= block2
->per_cu
4069 || block1
->size
!= block2
->size
4070 || memcmp (block1
->data
, block2
->data
, block1
->size
) != 0)
4075 internal_error (__FILE__
, __LINE__
, _("Unsupported field kind "
4076 "%d by check_types_equal"),
4077 FIELD_LOC_KIND (*field1
));
4080 worklist
->emplace_back (FIELD_TYPE (*field1
), FIELD_TYPE (*field2
));
4084 if (TYPE_TARGET_TYPE (type1
) != NULL
)
4086 if (TYPE_TARGET_TYPE (type2
) == NULL
)
4089 worklist
->emplace_back (TYPE_TARGET_TYPE (type1
),
4090 TYPE_TARGET_TYPE (type2
));
4092 else if (TYPE_TARGET_TYPE (type2
) != NULL
)
4098 /* Check types on a worklist for equality. Returns false if any pair
4099 is not equal, true if they are all considered equal. */
4102 check_types_worklist (std::vector
<type_equality_entry
> *worklist
,
4105 while (!worklist
->empty ())
4109 struct type_equality_entry entry
= std::move (worklist
->back ());
4110 worklist
->pop_back ();
4112 /* If the type pair has already been visited, we know it is
4114 cache
->insert (&entry
, sizeof (entry
), &added
);
4118 if (!check_types_equal (entry
.type1
, entry
.type2
, worklist
))
4125 /* Return true if types TYPE1 and TYPE2 are equal, as determined by a
4126 "deep comparison". Otherwise return false. */
4129 types_deeply_equal (struct type
*type1
, struct type
*type2
)
4131 std::vector
<type_equality_entry
> worklist
;
4133 gdb_assert (type1
!= NULL
&& type2
!= NULL
);
4135 /* Early exit for the simple case. */
4139 gdb::bcache
cache (nullptr, nullptr);
4140 worklist
.emplace_back (type1
, type2
);
4141 return check_types_worklist (&worklist
, &cache
);
4144 /* Allocated status of type TYPE. Return zero if type TYPE is allocated.
4145 Otherwise return one. */
4148 type_not_allocated (const struct type
*type
)
4150 struct dynamic_prop
*prop
= TYPE_ALLOCATED_PROP (type
);
4152 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
4153 && !TYPE_DYN_PROP_ADDR (prop
));
4156 /* Associated status of type TYPE. Return zero if type TYPE is associated.
4157 Otherwise return one. */
4160 type_not_associated (const struct type
*type
)
4162 struct dynamic_prop
*prop
= TYPE_ASSOCIATED_PROP (type
);
4164 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
4165 && !TYPE_DYN_PROP_ADDR (prop
));
4168 /* rank_one_type helper for when PARM's type code is TYPE_CODE_PTR. */
4171 rank_one_type_parm_ptr (struct type
*parm
, struct type
*arg
, struct value
*value
)
4173 struct rank rank
= {0,0};
4175 switch (TYPE_CODE (arg
))
4179 /* Allowed pointer conversions are:
4180 (a) pointer to void-pointer conversion. */
4181 if (TYPE_CODE (TYPE_TARGET_TYPE (parm
)) == TYPE_CODE_VOID
)
4182 return VOID_PTR_CONVERSION_BADNESS
;
4184 /* (b) pointer to ancestor-pointer conversion. */
4185 rank
.subrank
= distance_to_ancestor (TYPE_TARGET_TYPE (parm
),
4186 TYPE_TARGET_TYPE (arg
),
4188 if (rank
.subrank
>= 0)
4189 return sum_ranks (BASE_PTR_CONVERSION_BADNESS
, rank
);
4191 return INCOMPATIBLE_TYPE_BADNESS
;
4192 case TYPE_CODE_ARRAY
:
4194 struct type
*t1
= TYPE_TARGET_TYPE (parm
);
4195 struct type
*t2
= TYPE_TARGET_TYPE (arg
);
4197 if (types_equal (t1
, t2
))
4199 /* Make sure they are CV equal. */
4200 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4201 rank
.subrank
|= CV_CONVERSION_CONST
;
4202 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4203 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4204 if (rank
.subrank
!= 0)
4205 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4206 return EXACT_MATCH_BADNESS
;
4208 return INCOMPATIBLE_TYPE_BADNESS
;
4210 case TYPE_CODE_FUNC
:
4211 return rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
);
4213 if (value
!= NULL
&& TYPE_CODE (value_type (value
)) == TYPE_CODE_INT
)
4215 if (value_as_long (value
) == 0)
4217 /* Null pointer conversion: allow it to be cast to a pointer.
4218 [4.10.1 of C++ standard draft n3290] */
4219 return NULL_POINTER_CONVERSION_BADNESS
;
4223 /* If type checking is disabled, allow the conversion. */
4224 if (!strict_type_checking
)
4225 return NS_INTEGER_POINTER_CONVERSION_BADNESS
;
4229 case TYPE_CODE_ENUM
:
4230 case TYPE_CODE_FLAGS
:
4231 case TYPE_CODE_CHAR
:
4232 case TYPE_CODE_RANGE
:
4233 case TYPE_CODE_BOOL
:
4235 return INCOMPATIBLE_TYPE_BADNESS
;
4239 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ARRAY. */
4242 rank_one_type_parm_array (struct type
*parm
, struct type
*arg
, struct value
*value
)
4244 switch (TYPE_CODE (arg
))
4247 case TYPE_CODE_ARRAY
:
4248 return rank_one_type (TYPE_TARGET_TYPE (parm
),
4249 TYPE_TARGET_TYPE (arg
), NULL
);
4251 return INCOMPATIBLE_TYPE_BADNESS
;
4255 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FUNC. */
4258 rank_one_type_parm_func (struct type
*parm
, struct type
*arg
, struct value
*value
)
4260 switch (TYPE_CODE (arg
))
4262 case TYPE_CODE_PTR
: /* funcptr -> func */
4263 return rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
);
4265 return INCOMPATIBLE_TYPE_BADNESS
;
4269 /* rank_one_type helper for when PARM's type code is TYPE_CODE_INT. */
4272 rank_one_type_parm_int (struct type
*parm
, struct type
*arg
, struct value
*value
)
4274 switch (TYPE_CODE (arg
))
4277 if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4279 /* Deal with signed, unsigned, and plain chars and
4280 signed and unsigned ints. */
4281 if (TYPE_NOSIGN (parm
))
4283 /* This case only for character types. */
4284 if (TYPE_NOSIGN (arg
))
4285 return EXACT_MATCH_BADNESS
; /* plain char -> plain char */
4286 else /* signed/unsigned char -> plain char */
4287 return INTEGER_CONVERSION_BADNESS
;
4289 else if (TYPE_UNSIGNED (parm
))
4291 if (TYPE_UNSIGNED (arg
))
4293 /* unsigned int -> unsigned int, or
4294 unsigned long -> unsigned long */
4295 if (integer_types_same_name_p (TYPE_NAME (parm
),
4297 return EXACT_MATCH_BADNESS
;
4298 else if (integer_types_same_name_p (TYPE_NAME (arg
),
4300 && integer_types_same_name_p (TYPE_NAME (parm
),
4302 /* unsigned int -> unsigned long */
4303 return INTEGER_PROMOTION_BADNESS
;
4305 /* unsigned long -> unsigned int */
4306 return INTEGER_CONVERSION_BADNESS
;
4310 if (integer_types_same_name_p (TYPE_NAME (arg
),
4312 && integer_types_same_name_p (TYPE_NAME (parm
),
4314 /* signed long -> unsigned int */
4315 return INTEGER_CONVERSION_BADNESS
;
4317 /* signed int/long -> unsigned int/long */
4318 return INTEGER_CONVERSION_BADNESS
;
4321 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4323 if (integer_types_same_name_p (TYPE_NAME (parm
),
4325 return EXACT_MATCH_BADNESS
;
4326 else if (integer_types_same_name_p (TYPE_NAME (arg
),
4328 && integer_types_same_name_p (TYPE_NAME (parm
),
4330 return INTEGER_PROMOTION_BADNESS
;
4332 return INTEGER_CONVERSION_BADNESS
;
4335 return INTEGER_CONVERSION_BADNESS
;
4337 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4338 return INTEGER_PROMOTION_BADNESS
;
4340 return INTEGER_CONVERSION_BADNESS
;
4341 case TYPE_CODE_ENUM
:
4342 case TYPE_CODE_FLAGS
:
4343 case TYPE_CODE_CHAR
:
4344 case TYPE_CODE_RANGE
:
4345 case TYPE_CODE_BOOL
:
4346 if (TYPE_DECLARED_CLASS (arg
))
4347 return INCOMPATIBLE_TYPE_BADNESS
;
4348 return INTEGER_PROMOTION_BADNESS
;
4350 return INT_FLOAT_CONVERSION_BADNESS
;
4352 return NS_POINTER_CONVERSION_BADNESS
;
4354 return INCOMPATIBLE_TYPE_BADNESS
;
4358 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ENUM. */
4361 rank_one_type_parm_enum (struct type
*parm
, struct type
*arg
, struct value
*value
)
4363 switch (TYPE_CODE (arg
))
4366 case TYPE_CODE_CHAR
:
4367 case TYPE_CODE_RANGE
:
4368 case TYPE_CODE_BOOL
:
4369 case TYPE_CODE_ENUM
:
4370 if (TYPE_DECLARED_CLASS (parm
) || TYPE_DECLARED_CLASS (arg
))
4371 return INCOMPATIBLE_TYPE_BADNESS
;
4372 return INTEGER_CONVERSION_BADNESS
;
4374 return INT_FLOAT_CONVERSION_BADNESS
;
4376 return INCOMPATIBLE_TYPE_BADNESS
;
4380 /* rank_one_type helper for when PARM's type code is TYPE_CODE_CHAR. */
4383 rank_one_type_parm_char (struct type
*parm
, struct type
*arg
, struct value
*value
)
4385 switch (TYPE_CODE (arg
))
4387 case TYPE_CODE_RANGE
:
4388 case TYPE_CODE_BOOL
:
4389 case TYPE_CODE_ENUM
:
4390 if (TYPE_DECLARED_CLASS (arg
))
4391 return INCOMPATIBLE_TYPE_BADNESS
;
4392 return INTEGER_CONVERSION_BADNESS
;
4394 return INT_FLOAT_CONVERSION_BADNESS
;
4396 if (TYPE_LENGTH (arg
) > TYPE_LENGTH (parm
))
4397 return INTEGER_CONVERSION_BADNESS
;
4398 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4399 return INTEGER_PROMOTION_BADNESS
;
4401 case TYPE_CODE_CHAR
:
4402 /* Deal with signed, unsigned, and plain chars for C++ and
4403 with int cases falling through from previous case. */
4404 if (TYPE_NOSIGN (parm
))
4406 if (TYPE_NOSIGN (arg
))
4407 return EXACT_MATCH_BADNESS
;
4409 return INTEGER_CONVERSION_BADNESS
;
4411 else if (TYPE_UNSIGNED (parm
))
4413 if (TYPE_UNSIGNED (arg
))
4414 return EXACT_MATCH_BADNESS
;
4416 return INTEGER_PROMOTION_BADNESS
;
4418 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4419 return EXACT_MATCH_BADNESS
;
4421 return INTEGER_CONVERSION_BADNESS
;
4423 return INCOMPATIBLE_TYPE_BADNESS
;
4427 /* rank_one_type helper for when PARM's type code is TYPE_CODE_RANGE. */
4430 rank_one_type_parm_range (struct type
*parm
, struct type
*arg
, struct value
*value
)
4432 switch (TYPE_CODE (arg
))
4435 case TYPE_CODE_CHAR
:
4436 case TYPE_CODE_RANGE
:
4437 case TYPE_CODE_BOOL
:
4438 case TYPE_CODE_ENUM
:
4439 return INTEGER_CONVERSION_BADNESS
;
4441 return INT_FLOAT_CONVERSION_BADNESS
;
4443 return INCOMPATIBLE_TYPE_BADNESS
;
4447 /* rank_one_type helper for when PARM's type code is TYPE_CODE_BOOL. */
4450 rank_one_type_parm_bool (struct type
*parm
, struct type
*arg
, struct value
*value
)
4452 switch (TYPE_CODE (arg
))
4454 /* n3290 draft, section 4.12.1 (conv.bool):
4456 "A prvalue of arithmetic, unscoped enumeration, pointer, or
4457 pointer to member type can be converted to a prvalue of type
4458 bool. A zero value, null pointer value, or null member pointer
4459 value is converted to false; any other value is converted to
4460 true. A prvalue of type std::nullptr_t can be converted to a
4461 prvalue of type bool; the resulting value is false." */
4463 case TYPE_CODE_CHAR
:
4464 case TYPE_CODE_ENUM
:
4466 case TYPE_CODE_MEMBERPTR
:
4468 return BOOL_CONVERSION_BADNESS
;
4469 case TYPE_CODE_RANGE
:
4470 return INCOMPATIBLE_TYPE_BADNESS
;
4471 case TYPE_CODE_BOOL
:
4472 return EXACT_MATCH_BADNESS
;
4474 return INCOMPATIBLE_TYPE_BADNESS
;
4478 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FLOAT. */
4481 rank_one_type_parm_float (struct type
*parm
, struct type
*arg
, struct value
*value
)
4483 switch (TYPE_CODE (arg
))
4486 if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4487 return FLOAT_PROMOTION_BADNESS
;
4488 else if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4489 return EXACT_MATCH_BADNESS
;
4491 return FLOAT_CONVERSION_BADNESS
;
4493 case TYPE_CODE_BOOL
:
4494 case TYPE_CODE_ENUM
:
4495 case TYPE_CODE_RANGE
:
4496 case TYPE_CODE_CHAR
:
4497 return INT_FLOAT_CONVERSION_BADNESS
;
4499 return INCOMPATIBLE_TYPE_BADNESS
;
4503 /* rank_one_type helper for when PARM's type code is TYPE_CODE_COMPLEX. */
4506 rank_one_type_parm_complex (struct type
*parm
, struct type
*arg
, struct value
*value
)
4508 switch (TYPE_CODE (arg
))
4509 { /* Strictly not needed for C++, but... */
4511 return FLOAT_PROMOTION_BADNESS
;
4512 case TYPE_CODE_COMPLEX
:
4513 return EXACT_MATCH_BADNESS
;
4515 return INCOMPATIBLE_TYPE_BADNESS
;
4519 /* rank_one_type helper for when PARM's type code is TYPE_CODE_STRUCT. */
4522 rank_one_type_parm_struct (struct type
*parm
, struct type
*arg
, struct value
*value
)
4524 struct rank rank
= {0, 0};
4526 switch (TYPE_CODE (arg
))
4528 case TYPE_CODE_STRUCT
:
4529 /* Check for derivation */
4530 rank
.subrank
= distance_to_ancestor (parm
, arg
, 0);
4531 if (rank
.subrank
>= 0)
4532 return sum_ranks (BASE_CONVERSION_BADNESS
, rank
);
4535 return INCOMPATIBLE_TYPE_BADNESS
;
4539 /* rank_one_type helper for when PARM's type code is TYPE_CODE_SET. */
4542 rank_one_type_parm_set (struct type
*parm
, struct type
*arg
, struct value
*value
)
4544 switch (TYPE_CODE (arg
))
4548 return rank_one_type (TYPE_FIELD_TYPE (parm
, 0),
4549 TYPE_FIELD_TYPE (arg
, 0), NULL
);
4551 return INCOMPATIBLE_TYPE_BADNESS
;
4555 /* Compare one type (PARM) for compatibility with another (ARG).
4556 * PARM is intended to be the parameter type of a function; and
4557 * ARG is the supplied argument's type. This function tests if
4558 * the latter can be converted to the former.
4559 * VALUE is the argument's value or NULL if none (or called recursively)
4561 * Return 0 if they are identical types;
4562 * Otherwise, return an integer which corresponds to how compatible
4563 * PARM is to ARG. The higher the return value, the worse the match.
4564 * Generally the "bad" conversions are all uniformly assigned a 100. */
4567 rank_one_type (struct type
*parm
, struct type
*arg
, struct value
*value
)
4569 struct rank rank
= {0,0};
4571 /* Resolve typedefs */
4572 if (TYPE_CODE (parm
) == TYPE_CODE_TYPEDEF
)
4573 parm
= check_typedef (parm
);
4574 if (TYPE_CODE (arg
) == TYPE_CODE_TYPEDEF
)
4575 arg
= check_typedef (arg
);
4577 if (TYPE_IS_REFERENCE (parm
) && value
!= NULL
)
4579 if (VALUE_LVAL (value
) == not_lval
)
4581 /* Rvalues should preferably bind to rvalue references or const
4582 lvalue references. */
4583 if (TYPE_CODE (parm
) == TYPE_CODE_RVALUE_REF
)
4584 rank
.subrank
= REFERENCE_CONVERSION_RVALUE
;
4585 else if (TYPE_CONST (TYPE_TARGET_TYPE (parm
)))
4586 rank
.subrank
= REFERENCE_CONVERSION_CONST_LVALUE
;
4588 return INCOMPATIBLE_TYPE_BADNESS
;
4589 return sum_ranks (rank
, REFERENCE_CONVERSION_BADNESS
);
4593 /* It's illegal to pass an lvalue as an rvalue. */
4594 if (TYPE_CODE (parm
) == TYPE_CODE_RVALUE_REF
)
4595 return INCOMPATIBLE_TYPE_BADNESS
;
4599 if (types_equal (parm
, arg
))
4601 struct type
*t1
= parm
;
4602 struct type
*t2
= arg
;
4604 /* For pointers and references, compare target type. */
4605 if (TYPE_CODE (parm
) == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (parm
))
4607 t1
= TYPE_TARGET_TYPE (parm
);
4608 t2
= TYPE_TARGET_TYPE (arg
);
4611 /* Make sure they are CV equal, too. */
4612 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4613 rank
.subrank
|= CV_CONVERSION_CONST
;
4614 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4615 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4616 if (rank
.subrank
!= 0)
4617 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4618 return EXACT_MATCH_BADNESS
;
4621 /* See through references, since we can almost make non-references
4624 if (TYPE_IS_REFERENCE (arg
))
4625 return (sum_ranks (rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
),
4626 REFERENCE_SEE_THROUGH_BADNESS
));
4627 if (TYPE_IS_REFERENCE (parm
))
4628 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
),
4629 REFERENCE_SEE_THROUGH_BADNESS
));
4631 /* Debugging only. */
4632 fprintf_filtered (gdb_stderr
,
4633 "------ Arg is %s [%d], parm is %s [%d]\n",
4634 TYPE_NAME (arg
), TYPE_CODE (arg
),
4635 TYPE_NAME (parm
), TYPE_CODE (parm
));
4637 /* x -> y means arg of type x being supplied for parameter of type y. */
4639 switch (TYPE_CODE (parm
))
4642 return rank_one_type_parm_ptr (parm
, arg
, value
);
4643 case TYPE_CODE_ARRAY
:
4644 return rank_one_type_parm_array (parm
, arg
, value
);
4645 case TYPE_CODE_FUNC
:
4646 return rank_one_type_parm_func (parm
, arg
, value
);
4648 return rank_one_type_parm_int (parm
, arg
, value
);
4649 case TYPE_CODE_ENUM
:
4650 return rank_one_type_parm_enum (parm
, arg
, value
);
4651 case TYPE_CODE_CHAR
:
4652 return rank_one_type_parm_char (parm
, arg
, value
);
4653 case TYPE_CODE_RANGE
:
4654 return rank_one_type_parm_range (parm
, arg
, value
);
4655 case TYPE_CODE_BOOL
:
4656 return rank_one_type_parm_bool (parm
, arg
, value
);
4658 return rank_one_type_parm_float (parm
, arg
, value
);
4659 case TYPE_CODE_COMPLEX
:
4660 return rank_one_type_parm_complex (parm
, arg
, value
);
4661 case TYPE_CODE_STRUCT
:
4662 return rank_one_type_parm_struct (parm
, arg
, value
);
4664 return rank_one_type_parm_set (parm
, arg
, value
);
4666 return INCOMPATIBLE_TYPE_BADNESS
;
4667 } /* switch (TYPE_CODE (arg)) */
4670 /* End of functions for overload resolution. */
4672 /* Routines to pretty-print types. */
4675 print_bit_vector (B_TYPE
*bits
, int nbits
)
4679 for (bitno
= 0; bitno
< nbits
; bitno
++)
4681 if ((bitno
% 8) == 0)
4683 puts_filtered (" ");
4685 if (B_TST (bits
, bitno
))
4686 printf_filtered (("1"));
4688 printf_filtered (("0"));
4692 /* Note the first arg should be the "this" pointer, we may not want to
4693 include it since we may get into a infinitely recursive
4697 print_args (struct field
*args
, int nargs
, int spaces
)
4703 for (i
= 0; i
< nargs
; i
++)
4705 printfi_filtered (spaces
, "[%d] name '%s'\n", i
,
4706 args
[i
].name
!= NULL
? args
[i
].name
: "<NULL>");
4707 recursive_dump_type (args
[i
].type
, spaces
+ 2);
4713 field_is_static (struct field
*f
)
4715 /* "static" fields are the fields whose location is not relative
4716 to the address of the enclosing struct. It would be nice to
4717 have a dedicated flag that would be set for static fields when
4718 the type is being created. But in practice, checking the field
4719 loc_kind should give us an accurate answer. */
4720 return (FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSNAME
4721 || FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSADDR
);
4725 dump_fn_fieldlists (struct type
*type
, int spaces
)
4731 printfi_filtered (spaces
, "fn_fieldlists ");
4732 gdb_print_host_address (TYPE_FN_FIELDLISTS (type
), gdb_stdout
);
4733 printf_filtered ("\n");
4734 for (method_idx
= 0; method_idx
< TYPE_NFN_FIELDS (type
); method_idx
++)
4736 f
= TYPE_FN_FIELDLIST1 (type
, method_idx
);
4737 printfi_filtered (spaces
+ 2, "[%d] name '%s' (",
4739 TYPE_FN_FIELDLIST_NAME (type
, method_idx
));
4740 gdb_print_host_address (TYPE_FN_FIELDLIST_NAME (type
, method_idx
),
4742 printf_filtered (_(") length %d\n"),
4743 TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
));
4744 for (overload_idx
= 0;
4745 overload_idx
< TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
);
4748 printfi_filtered (spaces
+ 4, "[%d] physname '%s' (",
4750 TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
));
4751 gdb_print_host_address (TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
),
4753 printf_filtered (")\n");
4754 printfi_filtered (spaces
+ 8, "type ");
4755 gdb_print_host_address (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4757 printf_filtered ("\n");
4759 recursive_dump_type (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4762 printfi_filtered (spaces
+ 8, "args ");
4763 gdb_print_host_address (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4765 printf_filtered ("\n");
4766 print_args (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4767 TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f
, overload_idx
)),
4769 printfi_filtered (spaces
+ 8, "fcontext ");
4770 gdb_print_host_address (TYPE_FN_FIELD_FCONTEXT (f
, overload_idx
),
4772 printf_filtered ("\n");
4774 printfi_filtered (spaces
+ 8, "is_const %d\n",
4775 TYPE_FN_FIELD_CONST (f
, overload_idx
));
4776 printfi_filtered (spaces
+ 8, "is_volatile %d\n",
4777 TYPE_FN_FIELD_VOLATILE (f
, overload_idx
));
4778 printfi_filtered (spaces
+ 8, "is_private %d\n",
4779 TYPE_FN_FIELD_PRIVATE (f
, overload_idx
));
4780 printfi_filtered (spaces
+ 8, "is_protected %d\n",
4781 TYPE_FN_FIELD_PROTECTED (f
, overload_idx
));
4782 printfi_filtered (spaces
+ 8, "is_stub %d\n",
4783 TYPE_FN_FIELD_STUB (f
, overload_idx
));
4784 printfi_filtered (spaces
+ 8, "defaulted %d\n",
4785 TYPE_FN_FIELD_DEFAULTED (f
, overload_idx
));
4786 printfi_filtered (spaces
+ 8, "is_deleted %d\n",
4787 TYPE_FN_FIELD_DELETED (f
, overload_idx
));
4788 printfi_filtered (spaces
+ 8, "voffset %u\n",
4789 TYPE_FN_FIELD_VOFFSET (f
, overload_idx
));
4795 print_cplus_stuff (struct type
*type
, int spaces
)
4797 printfi_filtered (spaces
, "vptr_fieldno %d\n", TYPE_VPTR_FIELDNO (type
));
4798 printfi_filtered (spaces
, "vptr_basetype ");
4799 gdb_print_host_address (TYPE_VPTR_BASETYPE (type
), gdb_stdout
);
4800 puts_filtered ("\n");
4801 if (TYPE_VPTR_BASETYPE (type
) != NULL
)
4802 recursive_dump_type (TYPE_VPTR_BASETYPE (type
), spaces
+ 2);
4804 printfi_filtered (spaces
, "n_baseclasses %d\n",
4805 TYPE_N_BASECLASSES (type
));
4806 printfi_filtered (spaces
, "nfn_fields %d\n",
4807 TYPE_NFN_FIELDS (type
));
4808 if (TYPE_N_BASECLASSES (type
) > 0)
4810 printfi_filtered (spaces
, "virtual_field_bits (%d bits at *",
4811 TYPE_N_BASECLASSES (type
));
4812 gdb_print_host_address (TYPE_FIELD_VIRTUAL_BITS (type
),
4814 printf_filtered (")");
4816 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type
),
4817 TYPE_N_BASECLASSES (type
));
4818 puts_filtered ("\n");
4820 if (TYPE_NFIELDS (type
) > 0)
4822 if (TYPE_FIELD_PRIVATE_BITS (type
) != NULL
)
4824 printfi_filtered (spaces
,
4825 "private_field_bits (%d bits at *",
4826 TYPE_NFIELDS (type
));
4827 gdb_print_host_address (TYPE_FIELD_PRIVATE_BITS (type
),
4829 printf_filtered (")");
4830 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type
),
4831 TYPE_NFIELDS (type
));
4832 puts_filtered ("\n");
4834 if (TYPE_FIELD_PROTECTED_BITS (type
) != NULL
)
4836 printfi_filtered (spaces
,
4837 "protected_field_bits (%d bits at *",
4838 TYPE_NFIELDS (type
));
4839 gdb_print_host_address (TYPE_FIELD_PROTECTED_BITS (type
),
4841 printf_filtered (")");
4842 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type
),
4843 TYPE_NFIELDS (type
));
4844 puts_filtered ("\n");
4847 if (TYPE_NFN_FIELDS (type
) > 0)
4849 dump_fn_fieldlists (type
, spaces
);
4852 printfi_filtered (spaces
, "calling_convention %d\n",
4853 TYPE_CPLUS_CALLING_CONVENTION (type
));
4856 /* Print the contents of the TYPE's type_specific union, assuming that
4857 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
4860 print_gnat_stuff (struct type
*type
, int spaces
)
4862 struct type
*descriptive_type
= TYPE_DESCRIPTIVE_TYPE (type
);
4864 if (descriptive_type
== NULL
)
4865 printfi_filtered (spaces
+ 2, "no descriptive type\n");
4868 printfi_filtered (spaces
+ 2, "descriptive type\n");
4869 recursive_dump_type (descriptive_type
, spaces
+ 4);
4873 static struct obstack dont_print_type_obstack
;
4876 recursive_dump_type (struct type
*type
, int spaces
)
4881 obstack_begin (&dont_print_type_obstack
, 0);
4883 if (TYPE_NFIELDS (type
) > 0
4884 || (HAVE_CPLUS_STRUCT (type
) && TYPE_NFN_FIELDS (type
) > 0))
4886 struct type
**first_dont_print
4887 = (struct type
**) obstack_base (&dont_print_type_obstack
);
4889 int i
= (struct type
**)
4890 obstack_next_free (&dont_print_type_obstack
) - first_dont_print
;
4894 if (type
== first_dont_print
[i
])
4896 printfi_filtered (spaces
, "type node ");
4897 gdb_print_host_address (type
, gdb_stdout
);
4898 printf_filtered (_(" <same as already seen type>\n"));
4903 obstack_ptr_grow (&dont_print_type_obstack
, type
);
4906 printfi_filtered (spaces
, "type node ");
4907 gdb_print_host_address (type
, gdb_stdout
);
4908 printf_filtered ("\n");
4909 printfi_filtered (spaces
, "name '%s' (",
4910 TYPE_NAME (type
) ? TYPE_NAME (type
) : "<NULL>");
4911 gdb_print_host_address (TYPE_NAME (type
), gdb_stdout
);
4912 printf_filtered (")\n");
4913 printfi_filtered (spaces
, "code 0x%x ", TYPE_CODE (type
));
4914 switch (TYPE_CODE (type
))
4916 case TYPE_CODE_UNDEF
:
4917 printf_filtered ("(TYPE_CODE_UNDEF)");
4920 printf_filtered ("(TYPE_CODE_PTR)");
4922 case TYPE_CODE_ARRAY
:
4923 printf_filtered ("(TYPE_CODE_ARRAY)");
4925 case TYPE_CODE_STRUCT
:
4926 printf_filtered ("(TYPE_CODE_STRUCT)");
4928 case TYPE_CODE_UNION
:
4929 printf_filtered ("(TYPE_CODE_UNION)");
4931 case TYPE_CODE_ENUM
:
4932 printf_filtered ("(TYPE_CODE_ENUM)");
4934 case TYPE_CODE_FLAGS
:
4935 printf_filtered ("(TYPE_CODE_FLAGS)");
4937 case TYPE_CODE_FUNC
:
4938 printf_filtered ("(TYPE_CODE_FUNC)");
4941 printf_filtered ("(TYPE_CODE_INT)");
4944 printf_filtered ("(TYPE_CODE_FLT)");
4946 case TYPE_CODE_VOID
:
4947 printf_filtered ("(TYPE_CODE_VOID)");
4950 printf_filtered ("(TYPE_CODE_SET)");
4952 case TYPE_CODE_RANGE
:
4953 printf_filtered ("(TYPE_CODE_RANGE)");
4955 case TYPE_CODE_STRING
:
4956 printf_filtered ("(TYPE_CODE_STRING)");
4958 case TYPE_CODE_ERROR
:
4959 printf_filtered ("(TYPE_CODE_ERROR)");
4961 case TYPE_CODE_MEMBERPTR
:
4962 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
4964 case TYPE_CODE_METHODPTR
:
4965 printf_filtered ("(TYPE_CODE_METHODPTR)");
4967 case TYPE_CODE_METHOD
:
4968 printf_filtered ("(TYPE_CODE_METHOD)");
4971 printf_filtered ("(TYPE_CODE_REF)");
4973 case TYPE_CODE_CHAR
:
4974 printf_filtered ("(TYPE_CODE_CHAR)");
4976 case TYPE_CODE_BOOL
:
4977 printf_filtered ("(TYPE_CODE_BOOL)");
4979 case TYPE_CODE_COMPLEX
:
4980 printf_filtered ("(TYPE_CODE_COMPLEX)");
4982 case TYPE_CODE_TYPEDEF
:
4983 printf_filtered ("(TYPE_CODE_TYPEDEF)");
4985 case TYPE_CODE_NAMESPACE
:
4986 printf_filtered ("(TYPE_CODE_NAMESPACE)");
4989 printf_filtered ("(UNKNOWN TYPE CODE)");
4992 puts_filtered ("\n");
4993 printfi_filtered (spaces
, "length %s\n", pulongest (TYPE_LENGTH (type
)));
4994 if (TYPE_OBJFILE_OWNED (type
))
4996 printfi_filtered (spaces
, "objfile ");
4997 gdb_print_host_address (TYPE_OWNER (type
).objfile
, gdb_stdout
);
5001 printfi_filtered (spaces
, "gdbarch ");
5002 gdb_print_host_address (TYPE_OWNER (type
).gdbarch
, gdb_stdout
);
5004 printf_filtered ("\n");
5005 printfi_filtered (spaces
, "target_type ");
5006 gdb_print_host_address (TYPE_TARGET_TYPE (type
), gdb_stdout
);
5007 printf_filtered ("\n");
5008 if (TYPE_TARGET_TYPE (type
) != NULL
)
5010 recursive_dump_type (TYPE_TARGET_TYPE (type
), spaces
+ 2);
5012 printfi_filtered (spaces
, "pointer_type ");
5013 gdb_print_host_address (TYPE_POINTER_TYPE (type
), gdb_stdout
);
5014 printf_filtered ("\n");
5015 printfi_filtered (spaces
, "reference_type ");
5016 gdb_print_host_address (TYPE_REFERENCE_TYPE (type
), gdb_stdout
);
5017 printf_filtered ("\n");
5018 printfi_filtered (spaces
, "type_chain ");
5019 gdb_print_host_address (TYPE_CHAIN (type
), gdb_stdout
);
5020 printf_filtered ("\n");
5021 printfi_filtered (spaces
, "instance_flags 0x%x",
5022 TYPE_INSTANCE_FLAGS (type
));
5023 if (TYPE_CONST (type
))
5025 puts_filtered (" TYPE_CONST");
5027 if (TYPE_VOLATILE (type
))
5029 puts_filtered (" TYPE_VOLATILE");
5031 if (TYPE_CODE_SPACE (type
))
5033 puts_filtered (" TYPE_CODE_SPACE");
5035 if (TYPE_DATA_SPACE (type
))
5037 puts_filtered (" TYPE_DATA_SPACE");
5039 if (TYPE_ADDRESS_CLASS_1 (type
))
5041 puts_filtered (" TYPE_ADDRESS_CLASS_1");
5043 if (TYPE_ADDRESS_CLASS_2 (type
))
5045 puts_filtered (" TYPE_ADDRESS_CLASS_2");
5047 if (TYPE_RESTRICT (type
))
5049 puts_filtered (" TYPE_RESTRICT");
5051 if (TYPE_ATOMIC (type
))
5053 puts_filtered (" TYPE_ATOMIC");
5055 puts_filtered ("\n");
5057 printfi_filtered (spaces
, "flags");
5058 if (TYPE_UNSIGNED (type
))
5060 puts_filtered (" TYPE_UNSIGNED");
5062 if (TYPE_NOSIGN (type
))
5064 puts_filtered (" TYPE_NOSIGN");
5066 if (TYPE_ENDIANITY_NOT_DEFAULT (type
))
5068 puts_filtered (" TYPE_ENDIANITY_NOT_DEFAULT");
5070 if (TYPE_STUB (type
))
5072 puts_filtered (" TYPE_STUB");
5074 if (TYPE_TARGET_STUB (type
))
5076 puts_filtered (" TYPE_TARGET_STUB");
5078 if (TYPE_PROTOTYPED (type
))
5080 puts_filtered (" TYPE_PROTOTYPED");
5082 if (TYPE_VARARGS (type
))
5084 puts_filtered (" TYPE_VARARGS");
5086 /* This is used for things like AltiVec registers on ppc. Gcc emits
5087 an attribute for the array type, which tells whether or not we
5088 have a vector, instead of a regular array. */
5089 if (TYPE_VECTOR (type
))
5091 puts_filtered (" TYPE_VECTOR");
5093 if (TYPE_FIXED_INSTANCE (type
))
5095 puts_filtered (" TYPE_FIXED_INSTANCE");
5097 if (TYPE_STUB_SUPPORTED (type
))
5099 puts_filtered (" TYPE_STUB_SUPPORTED");
5101 if (TYPE_NOTTEXT (type
))
5103 puts_filtered (" TYPE_NOTTEXT");
5105 puts_filtered ("\n");
5106 printfi_filtered (spaces
, "nfields %d ", TYPE_NFIELDS (type
));
5107 gdb_print_host_address (TYPE_FIELDS (type
), gdb_stdout
);
5108 puts_filtered ("\n");
5109 for (idx
= 0; idx
< TYPE_NFIELDS (type
); idx
++)
5111 if (TYPE_CODE (type
) == TYPE_CODE_ENUM
)
5112 printfi_filtered (spaces
+ 2,
5113 "[%d] enumval %s type ",
5114 idx
, plongest (TYPE_FIELD_ENUMVAL (type
, idx
)));
5116 printfi_filtered (spaces
+ 2,
5117 "[%d] bitpos %s bitsize %d type ",
5118 idx
, plongest (TYPE_FIELD_BITPOS (type
, idx
)),
5119 TYPE_FIELD_BITSIZE (type
, idx
));
5120 gdb_print_host_address (TYPE_FIELD_TYPE (type
, idx
), gdb_stdout
);
5121 printf_filtered (" name '%s' (",
5122 TYPE_FIELD_NAME (type
, idx
) != NULL
5123 ? TYPE_FIELD_NAME (type
, idx
)
5125 gdb_print_host_address (TYPE_FIELD_NAME (type
, idx
), gdb_stdout
);
5126 printf_filtered (")\n");
5127 if (TYPE_FIELD_TYPE (type
, idx
) != NULL
)
5129 recursive_dump_type (TYPE_FIELD_TYPE (type
, idx
), spaces
+ 4);
5132 if (TYPE_CODE (type
) == TYPE_CODE_RANGE
)
5134 printfi_filtered (spaces
, "low %s%s high %s%s\n",
5135 plongest (TYPE_LOW_BOUND (type
)),
5136 TYPE_LOW_BOUND_UNDEFINED (type
) ? " (undefined)" : "",
5137 plongest (TYPE_HIGH_BOUND (type
)),
5138 TYPE_HIGH_BOUND_UNDEFINED (type
)
5139 ? " (undefined)" : "");
5142 switch (TYPE_SPECIFIC_FIELD (type
))
5144 case TYPE_SPECIFIC_CPLUS_STUFF
:
5145 printfi_filtered (spaces
, "cplus_stuff ");
5146 gdb_print_host_address (TYPE_CPLUS_SPECIFIC (type
),
5148 puts_filtered ("\n");
5149 print_cplus_stuff (type
, spaces
);
5152 case TYPE_SPECIFIC_GNAT_STUFF
:
5153 printfi_filtered (spaces
, "gnat_stuff ");
5154 gdb_print_host_address (TYPE_GNAT_SPECIFIC (type
), gdb_stdout
);
5155 puts_filtered ("\n");
5156 print_gnat_stuff (type
, spaces
);
5159 case TYPE_SPECIFIC_FLOATFORMAT
:
5160 printfi_filtered (spaces
, "floatformat ");
5161 if (TYPE_FLOATFORMAT (type
) == NULL
5162 || TYPE_FLOATFORMAT (type
)->name
== NULL
)
5163 puts_filtered ("(null)");
5165 puts_filtered (TYPE_FLOATFORMAT (type
)->name
);
5166 puts_filtered ("\n");
5169 case TYPE_SPECIFIC_FUNC
:
5170 printfi_filtered (spaces
, "calling_convention %d\n",
5171 TYPE_CALLING_CONVENTION (type
));
5172 /* tail_call_list is not printed. */
5175 case TYPE_SPECIFIC_SELF_TYPE
:
5176 printfi_filtered (spaces
, "self_type ");
5177 gdb_print_host_address (TYPE_SELF_TYPE (type
), gdb_stdout
);
5178 puts_filtered ("\n");
5183 obstack_free (&dont_print_type_obstack
, NULL
);
5186 /* Trivial helpers for the libiberty hash table, for mapping one
5189 struct type_pair
: public allocate_on_obstack
5191 type_pair (struct type
*old_
, struct type
*newobj_
)
5192 : old (old_
), newobj (newobj_
)
5195 struct type
* const old
, * const newobj
;
5199 type_pair_hash (const void *item
)
5201 const struct type_pair
*pair
= (const struct type_pair
*) item
;
5203 return htab_hash_pointer (pair
->old
);
5207 type_pair_eq (const void *item_lhs
, const void *item_rhs
)
5209 const struct type_pair
*lhs
= (const struct type_pair
*) item_lhs
;
5210 const struct type_pair
*rhs
= (const struct type_pair
*) item_rhs
;
5212 return lhs
->old
== rhs
->old
;
5215 /* Allocate the hash table used by copy_type_recursive to walk
5216 types without duplicates. We use OBJFILE's obstack, because
5217 OBJFILE is about to be deleted. */
5220 create_copied_types_hash (struct objfile
*objfile
)
5222 return htab_create_alloc_ex (1, type_pair_hash
, type_pair_eq
,
5223 NULL
, &objfile
->objfile_obstack
,
5224 hashtab_obstack_allocate
,
5225 dummy_obstack_deallocate
);
5228 /* Recursively copy (deep copy) a dynamic attribute list of a type. */
5230 static struct dynamic_prop_list
*
5231 copy_dynamic_prop_list (struct obstack
*objfile_obstack
,
5232 struct dynamic_prop_list
*list
)
5234 struct dynamic_prop_list
*copy
= list
;
5235 struct dynamic_prop_list
**node_ptr
= ©
;
5237 while (*node_ptr
!= NULL
)
5239 struct dynamic_prop_list
*node_copy
;
5241 node_copy
= ((struct dynamic_prop_list
*)
5242 obstack_copy (objfile_obstack
, *node_ptr
,
5243 sizeof (struct dynamic_prop_list
)));
5244 node_copy
->prop
= (*node_ptr
)->prop
;
5245 *node_ptr
= node_copy
;
5247 node_ptr
= &node_copy
->next
;
5253 /* Recursively copy (deep copy) TYPE, if it is associated with
5254 OBJFILE. Return a new type owned by the gdbarch associated with the type, a
5255 saved type if we have already visited TYPE (using COPIED_TYPES), or TYPE if
5256 it is not associated with OBJFILE. */
5259 copy_type_recursive (struct objfile
*objfile
,
5261 htab_t copied_types
)
5264 struct type
*new_type
;
5266 if (! TYPE_OBJFILE_OWNED (type
))
5269 /* This type shouldn't be pointing to any types in other objfiles;
5270 if it did, the type might disappear unexpectedly. */
5271 gdb_assert (TYPE_OBJFILE (type
) == objfile
);
5273 struct type_pair
pair (type
, nullptr);
5275 slot
= htab_find_slot (copied_types
, &pair
, INSERT
);
5277 return ((struct type_pair
*) *slot
)->newobj
;
5279 new_type
= alloc_type_arch (get_type_arch (type
));
5281 /* We must add the new type to the hash table immediately, in case
5282 we encounter this type again during a recursive call below. */
5283 struct type_pair
*stored
5284 = new (&objfile
->objfile_obstack
) struct type_pair (type
, new_type
);
5288 /* Copy the common fields of types. For the main type, we simply
5289 copy the entire thing and then update specific fields as needed. */
5290 *TYPE_MAIN_TYPE (new_type
) = *TYPE_MAIN_TYPE (type
);
5291 TYPE_OBJFILE_OWNED (new_type
) = 0;
5292 TYPE_OWNER (new_type
).gdbarch
= get_type_arch (type
);
5294 if (TYPE_NAME (type
))
5295 TYPE_NAME (new_type
) = xstrdup (TYPE_NAME (type
));
5297 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5298 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5300 /* Copy the fields. */
5301 if (TYPE_NFIELDS (type
))
5305 nfields
= TYPE_NFIELDS (type
);
5306 TYPE_FIELDS (new_type
) = (struct field
*)
5307 TYPE_ZALLOC (new_type
, nfields
* sizeof (struct field
));
5308 for (i
= 0; i
< nfields
; i
++)
5310 TYPE_FIELD_ARTIFICIAL (new_type
, i
) =
5311 TYPE_FIELD_ARTIFICIAL (type
, i
);
5312 TYPE_FIELD_BITSIZE (new_type
, i
) = TYPE_FIELD_BITSIZE (type
, i
);
5313 if (TYPE_FIELD_TYPE (type
, i
))
5314 TYPE_FIELD_TYPE (new_type
, i
)
5315 = copy_type_recursive (objfile
, TYPE_FIELD_TYPE (type
, i
),
5317 if (TYPE_FIELD_NAME (type
, i
))
5318 TYPE_FIELD_NAME (new_type
, i
) =
5319 xstrdup (TYPE_FIELD_NAME (type
, i
));
5320 switch (TYPE_FIELD_LOC_KIND (type
, i
))
5322 case FIELD_LOC_KIND_BITPOS
:
5323 SET_FIELD_BITPOS (TYPE_FIELD (new_type
, i
),
5324 TYPE_FIELD_BITPOS (type
, i
));
5326 case FIELD_LOC_KIND_ENUMVAL
:
5327 SET_FIELD_ENUMVAL (TYPE_FIELD (new_type
, i
),
5328 TYPE_FIELD_ENUMVAL (type
, i
));
5330 case FIELD_LOC_KIND_PHYSADDR
:
5331 SET_FIELD_PHYSADDR (TYPE_FIELD (new_type
, i
),
5332 TYPE_FIELD_STATIC_PHYSADDR (type
, i
));
5334 case FIELD_LOC_KIND_PHYSNAME
:
5335 SET_FIELD_PHYSNAME (TYPE_FIELD (new_type
, i
),
5336 xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type
,
5340 internal_error (__FILE__
, __LINE__
,
5341 _("Unexpected type field location kind: %d"),
5342 TYPE_FIELD_LOC_KIND (type
, i
));
5347 /* For range types, copy the bounds information. */
5348 if (TYPE_CODE (type
) == TYPE_CODE_RANGE
)
5350 TYPE_RANGE_DATA (new_type
) = (struct range_bounds
*)
5351 TYPE_ALLOC (new_type
, sizeof (struct range_bounds
));
5352 *TYPE_RANGE_DATA (new_type
) = *TYPE_RANGE_DATA (type
);
5355 if (TYPE_DYN_PROP_LIST (type
) != NULL
)
5356 TYPE_DYN_PROP_LIST (new_type
)
5357 = copy_dynamic_prop_list (&objfile
->objfile_obstack
,
5358 TYPE_DYN_PROP_LIST (type
));
5361 /* Copy pointers to other types. */
5362 if (TYPE_TARGET_TYPE (type
))
5363 TYPE_TARGET_TYPE (new_type
) =
5364 copy_type_recursive (objfile
,
5365 TYPE_TARGET_TYPE (type
),
5368 /* Maybe copy the type_specific bits.
5370 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
5371 base classes and methods. There's no fundamental reason why we
5372 can't, but at the moment it is not needed. */
5374 switch (TYPE_SPECIFIC_FIELD (type
))
5376 case TYPE_SPECIFIC_NONE
:
5378 case TYPE_SPECIFIC_FUNC
:
5379 INIT_FUNC_SPECIFIC (new_type
);
5380 TYPE_CALLING_CONVENTION (new_type
) = TYPE_CALLING_CONVENTION (type
);
5381 TYPE_NO_RETURN (new_type
) = TYPE_NO_RETURN (type
);
5382 TYPE_TAIL_CALL_LIST (new_type
) = NULL
;
5384 case TYPE_SPECIFIC_FLOATFORMAT
:
5385 TYPE_FLOATFORMAT (new_type
) = TYPE_FLOATFORMAT (type
);
5387 case TYPE_SPECIFIC_CPLUS_STUFF
:
5388 INIT_CPLUS_SPECIFIC (new_type
);
5390 case TYPE_SPECIFIC_GNAT_STUFF
:
5391 INIT_GNAT_SPECIFIC (new_type
);
5393 case TYPE_SPECIFIC_SELF_TYPE
:
5394 set_type_self_type (new_type
,
5395 copy_type_recursive (objfile
, TYPE_SELF_TYPE (type
),
5399 gdb_assert_not_reached ("bad type_specific_kind");
5405 /* Make a copy of the given TYPE, except that the pointer & reference
5406 types are not preserved.
5408 This function assumes that the given type has an associated objfile.
5409 This objfile is used to allocate the new type. */
5412 copy_type (const struct type
*type
)
5414 struct type
*new_type
;
5416 gdb_assert (TYPE_OBJFILE_OWNED (type
));
5418 new_type
= alloc_type_copy (type
);
5419 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5420 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5421 memcpy (TYPE_MAIN_TYPE (new_type
), TYPE_MAIN_TYPE (type
),
5422 sizeof (struct main_type
));
5423 if (TYPE_DYN_PROP_LIST (type
) != NULL
)
5424 TYPE_DYN_PROP_LIST (new_type
)
5425 = copy_dynamic_prop_list (&TYPE_OBJFILE (type
) -> objfile_obstack
,
5426 TYPE_DYN_PROP_LIST (type
));
5431 /* Helper functions to initialize architecture-specific types. */
5433 /* Allocate a type structure associated with GDBARCH and set its
5434 CODE, LENGTH, and NAME fields. */
5437 arch_type (struct gdbarch
*gdbarch
,
5438 enum type_code code
, int bit
, const char *name
)
5442 type
= alloc_type_arch (gdbarch
);
5443 set_type_code (type
, code
);
5444 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
5445 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
5448 TYPE_NAME (type
) = gdbarch_obstack_strdup (gdbarch
, name
);
5453 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
5454 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5455 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5458 arch_integer_type (struct gdbarch
*gdbarch
,
5459 int bit
, int unsigned_p
, const char *name
)
5463 t
= arch_type (gdbarch
, TYPE_CODE_INT
, bit
, name
);
5465 TYPE_UNSIGNED (t
) = 1;
5470 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
5471 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5472 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5475 arch_character_type (struct gdbarch
*gdbarch
,
5476 int bit
, int unsigned_p
, const char *name
)
5480 t
= arch_type (gdbarch
, TYPE_CODE_CHAR
, bit
, name
);
5482 TYPE_UNSIGNED (t
) = 1;
5487 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
5488 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5489 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5492 arch_boolean_type (struct gdbarch
*gdbarch
,
5493 int bit
, int unsigned_p
, const char *name
)
5497 t
= arch_type (gdbarch
, TYPE_CODE_BOOL
, bit
, name
);
5499 TYPE_UNSIGNED (t
) = 1;
5504 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
5505 BIT is the type size in bits; if BIT equals -1, the size is
5506 determined by the floatformat. NAME is the type name. Set the
5507 TYPE_FLOATFORMAT from FLOATFORMATS. */
5510 arch_float_type (struct gdbarch
*gdbarch
,
5511 int bit
, const char *name
,
5512 const struct floatformat
**floatformats
)
5514 const struct floatformat
*fmt
= floatformats
[gdbarch_byte_order (gdbarch
)];
5517 bit
= verify_floatformat (bit
, fmt
);
5518 t
= arch_type (gdbarch
, TYPE_CODE_FLT
, bit
, name
);
5519 TYPE_FLOATFORMAT (t
) = fmt
;
5524 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with GDBARCH.
5525 BIT is the type size in bits. NAME is the type name. */
5528 arch_decfloat_type (struct gdbarch
*gdbarch
, int bit
, const char *name
)
5532 t
= arch_type (gdbarch
, TYPE_CODE_DECFLOAT
, bit
, name
);
5536 /* Allocate a TYPE_CODE_PTR type structure associated with GDBARCH.
5537 BIT is the pointer type size in bits. NAME is the type name.
5538 TARGET_TYPE is the pointer target type. Always sets the pointer type's
5539 TYPE_UNSIGNED flag. */
5542 arch_pointer_type (struct gdbarch
*gdbarch
,
5543 int bit
, const char *name
, struct type
*target_type
)
5547 t
= arch_type (gdbarch
, TYPE_CODE_PTR
, bit
, name
);
5548 TYPE_TARGET_TYPE (t
) = target_type
;
5549 TYPE_UNSIGNED (t
) = 1;
5553 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
5554 NAME is the type name. BIT is the size of the flag word in bits. */
5557 arch_flags_type (struct gdbarch
*gdbarch
, const char *name
, int bit
)
5561 type
= arch_type (gdbarch
, TYPE_CODE_FLAGS
, bit
, name
);
5562 TYPE_UNSIGNED (type
) = 1;
5563 TYPE_NFIELDS (type
) = 0;
5564 /* Pre-allocate enough space assuming every field is one bit. */
5566 = (struct field
*) TYPE_ZALLOC (type
, bit
* sizeof (struct field
));
5571 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5572 position BITPOS is called NAME. Pass NAME as "" for fields that
5573 should not be printed. */
5576 append_flags_type_field (struct type
*type
, int start_bitpos
, int nr_bits
,
5577 struct type
*field_type
, const char *name
)
5579 int type_bitsize
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
5580 int field_nr
= TYPE_NFIELDS (type
);
5582 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_FLAGS
);
5583 gdb_assert (TYPE_NFIELDS (type
) + 1 <= type_bitsize
);
5584 gdb_assert (start_bitpos
>= 0 && start_bitpos
< type_bitsize
);
5585 gdb_assert (nr_bits
>= 1 && nr_bits
<= type_bitsize
);
5586 gdb_assert (name
!= NULL
);
5588 TYPE_FIELD_NAME (type
, field_nr
) = xstrdup (name
);
5589 TYPE_FIELD_TYPE (type
, field_nr
) = field_type
;
5590 SET_FIELD_BITPOS (TYPE_FIELD (type
, field_nr
), start_bitpos
);
5591 TYPE_FIELD_BITSIZE (type
, field_nr
) = nr_bits
;
5592 ++TYPE_NFIELDS (type
);
5595 /* Special version of append_flags_type_field to add a flag field.
5596 Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5597 position BITPOS is called NAME. */
5600 append_flags_type_flag (struct type
*type
, int bitpos
, const char *name
)
5602 struct gdbarch
*gdbarch
= get_type_arch (type
);
5604 append_flags_type_field (type
, bitpos
, 1,
5605 builtin_type (gdbarch
)->builtin_bool
,
5609 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
5610 specified by CODE) associated with GDBARCH. NAME is the type name. */
5613 arch_composite_type (struct gdbarch
*gdbarch
, const char *name
,
5614 enum type_code code
)
5618 gdb_assert (code
== TYPE_CODE_STRUCT
|| code
== TYPE_CODE_UNION
);
5619 t
= arch_type (gdbarch
, code
, 0, NULL
);
5620 TYPE_NAME (t
) = name
;
5621 INIT_CPLUS_SPECIFIC (t
);
5625 /* Add new field with name NAME and type FIELD to composite type T.
5626 Do not set the field's position or adjust the type's length;
5627 the caller should do so. Return the new field. */
5630 append_composite_type_field_raw (struct type
*t
, const char *name
,
5635 TYPE_NFIELDS (t
) = TYPE_NFIELDS (t
) + 1;
5636 TYPE_FIELDS (t
) = XRESIZEVEC (struct field
, TYPE_FIELDS (t
),
5638 f
= &(TYPE_FIELDS (t
)[TYPE_NFIELDS (t
) - 1]);
5639 memset (f
, 0, sizeof f
[0]);
5640 FIELD_TYPE (f
[0]) = field
;
5641 FIELD_NAME (f
[0]) = name
;
5645 /* Add new field with name NAME and type FIELD to composite type T.
5646 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
5649 append_composite_type_field_aligned (struct type
*t
, const char *name
,
5650 struct type
*field
, int alignment
)
5652 struct field
*f
= append_composite_type_field_raw (t
, name
, field
);
5654 if (TYPE_CODE (t
) == TYPE_CODE_UNION
)
5656 if (TYPE_LENGTH (t
) < TYPE_LENGTH (field
))
5657 TYPE_LENGTH (t
) = TYPE_LENGTH (field
);
5659 else if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
5661 TYPE_LENGTH (t
) = TYPE_LENGTH (t
) + TYPE_LENGTH (field
);
5662 if (TYPE_NFIELDS (t
) > 1)
5664 SET_FIELD_BITPOS (f
[0],
5665 (FIELD_BITPOS (f
[-1])
5666 + (TYPE_LENGTH (FIELD_TYPE (f
[-1]))
5667 * TARGET_CHAR_BIT
)));
5673 alignment
*= TARGET_CHAR_BIT
;
5674 left
= FIELD_BITPOS (f
[0]) % alignment
;
5678 SET_FIELD_BITPOS (f
[0], FIELD_BITPOS (f
[0]) + (alignment
- left
));
5679 TYPE_LENGTH (t
) += (alignment
- left
) / TARGET_CHAR_BIT
;
5686 /* Add new field with name NAME and type FIELD to composite type T. */
5689 append_composite_type_field (struct type
*t
, const char *name
,
5692 append_composite_type_field_aligned (t
, name
, field
, 0);
5695 static struct gdbarch_data
*gdbtypes_data
;
5697 const struct builtin_type
*
5698 builtin_type (struct gdbarch
*gdbarch
)
5700 return (const struct builtin_type
*) gdbarch_data (gdbarch
, gdbtypes_data
);
5704 gdbtypes_post_init (struct gdbarch
*gdbarch
)
5706 struct builtin_type
*builtin_type
5707 = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct builtin_type
);
5710 builtin_type
->builtin_void
5711 = arch_type (gdbarch
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5712 builtin_type
->builtin_char
5713 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5714 !gdbarch_char_signed (gdbarch
), "char");
5715 TYPE_NOSIGN (builtin_type
->builtin_char
) = 1;
5716 builtin_type
->builtin_signed_char
5717 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5719 builtin_type
->builtin_unsigned_char
5720 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5721 1, "unsigned char");
5722 builtin_type
->builtin_short
5723 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5725 builtin_type
->builtin_unsigned_short
5726 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5727 1, "unsigned short");
5728 builtin_type
->builtin_int
5729 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5731 builtin_type
->builtin_unsigned_int
5732 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5734 builtin_type
->builtin_long
5735 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5737 builtin_type
->builtin_unsigned_long
5738 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5739 1, "unsigned long");
5740 builtin_type
->builtin_long_long
5741 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5743 builtin_type
->builtin_unsigned_long_long
5744 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5745 1, "unsigned long long");
5746 builtin_type
->builtin_half
5747 = arch_float_type (gdbarch
, gdbarch_half_bit (gdbarch
),
5748 "half", gdbarch_half_format (gdbarch
));
5749 builtin_type
->builtin_float
5750 = arch_float_type (gdbarch
, gdbarch_float_bit (gdbarch
),
5751 "float", gdbarch_float_format (gdbarch
));
5752 builtin_type
->builtin_double
5753 = arch_float_type (gdbarch
, gdbarch_double_bit (gdbarch
),
5754 "double", gdbarch_double_format (gdbarch
));
5755 builtin_type
->builtin_long_double
5756 = arch_float_type (gdbarch
, gdbarch_long_double_bit (gdbarch
),
5757 "long double", gdbarch_long_double_format (gdbarch
));
5758 builtin_type
->builtin_complex
5759 = init_complex_type ("complex", builtin_type
->builtin_float
);
5760 builtin_type
->builtin_double_complex
5761 = init_complex_type ("double complex", builtin_type
->builtin_double
);
5762 builtin_type
->builtin_string
5763 = arch_type (gdbarch
, TYPE_CODE_STRING
, TARGET_CHAR_BIT
, "string");
5764 builtin_type
->builtin_bool
5765 = arch_type (gdbarch
, TYPE_CODE_BOOL
, TARGET_CHAR_BIT
, "bool");
5767 /* The following three are about decimal floating point types, which
5768 are 32-bits, 64-bits and 128-bits respectively. */
5769 builtin_type
->builtin_decfloat
5770 = arch_decfloat_type (gdbarch
, 32, "_Decimal32");
5771 builtin_type
->builtin_decdouble
5772 = arch_decfloat_type (gdbarch
, 64, "_Decimal64");
5773 builtin_type
->builtin_declong
5774 = arch_decfloat_type (gdbarch
, 128, "_Decimal128");
5776 /* "True" character types. */
5777 builtin_type
->builtin_true_char
5778 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 0, "true character");
5779 builtin_type
->builtin_true_unsigned_char
5780 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 1, "true character");
5782 /* Fixed-size integer types. */
5783 builtin_type
->builtin_int0
5784 = arch_integer_type (gdbarch
, 0, 0, "int0_t");
5785 builtin_type
->builtin_int8
5786 = arch_integer_type (gdbarch
, 8, 0, "int8_t");
5787 builtin_type
->builtin_uint8
5788 = arch_integer_type (gdbarch
, 8, 1, "uint8_t");
5789 builtin_type
->builtin_int16
5790 = arch_integer_type (gdbarch
, 16, 0, "int16_t");
5791 builtin_type
->builtin_uint16
5792 = arch_integer_type (gdbarch
, 16, 1, "uint16_t");
5793 builtin_type
->builtin_int24
5794 = arch_integer_type (gdbarch
, 24, 0, "int24_t");
5795 builtin_type
->builtin_uint24
5796 = arch_integer_type (gdbarch
, 24, 1, "uint24_t");
5797 builtin_type
->builtin_int32
5798 = arch_integer_type (gdbarch
, 32, 0, "int32_t");
5799 builtin_type
->builtin_uint32
5800 = arch_integer_type (gdbarch
, 32, 1, "uint32_t");
5801 builtin_type
->builtin_int64
5802 = arch_integer_type (gdbarch
, 64, 0, "int64_t");
5803 builtin_type
->builtin_uint64
5804 = arch_integer_type (gdbarch
, 64, 1, "uint64_t");
5805 builtin_type
->builtin_int128
5806 = arch_integer_type (gdbarch
, 128, 0, "int128_t");
5807 builtin_type
->builtin_uint128
5808 = arch_integer_type (gdbarch
, 128, 1, "uint128_t");
5809 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_int8
) |=
5810 TYPE_INSTANCE_FLAG_NOTTEXT
;
5811 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_uint8
) |=
5812 TYPE_INSTANCE_FLAG_NOTTEXT
;
5814 /* Wide character types. */
5815 builtin_type
->builtin_char16
5816 = arch_integer_type (gdbarch
, 16, 1, "char16_t");
5817 builtin_type
->builtin_char32
5818 = arch_integer_type (gdbarch
, 32, 1, "char32_t");
5819 builtin_type
->builtin_wchar
5820 = arch_integer_type (gdbarch
, gdbarch_wchar_bit (gdbarch
),
5821 !gdbarch_wchar_signed (gdbarch
), "wchar_t");
5823 /* Default data/code pointer types. */
5824 builtin_type
->builtin_data_ptr
5825 = lookup_pointer_type (builtin_type
->builtin_void
);
5826 builtin_type
->builtin_func_ptr
5827 = lookup_pointer_type (lookup_function_type (builtin_type
->builtin_void
));
5828 builtin_type
->builtin_func_func
5829 = lookup_function_type (builtin_type
->builtin_func_ptr
);
5831 /* This type represents a GDB internal function. */
5832 builtin_type
->internal_fn
5833 = arch_type (gdbarch
, TYPE_CODE_INTERNAL_FUNCTION
, 0,
5834 "<internal function>");
5836 /* This type represents an xmethod. */
5837 builtin_type
->xmethod
5838 = arch_type (gdbarch
, TYPE_CODE_XMETHOD
, 0, "<xmethod>");
5840 return builtin_type
;
5843 /* This set of objfile-based types is intended to be used by symbol
5844 readers as basic types. */
5846 static const struct objfile_key
<struct objfile_type
,
5847 gdb::noop_deleter
<struct objfile_type
>>
5850 const struct objfile_type
*
5851 objfile_type (struct objfile
*objfile
)
5853 struct gdbarch
*gdbarch
;
5854 struct objfile_type
*objfile_type
= objfile_type_data
.get (objfile
);
5857 return objfile_type
;
5859 objfile_type
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
5860 1, struct objfile_type
);
5862 /* Use the objfile architecture to determine basic type properties. */
5863 gdbarch
= objfile
->arch ();
5866 objfile_type
->builtin_void
5867 = init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5868 objfile_type
->builtin_char
5869 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5870 !gdbarch_char_signed (gdbarch
), "char");
5871 TYPE_NOSIGN (objfile_type
->builtin_char
) = 1;
5872 objfile_type
->builtin_signed_char
5873 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5875 objfile_type
->builtin_unsigned_char
5876 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5877 1, "unsigned char");
5878 objfile_type
->builtin_short
5879 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5881 objfile_type
->builtin_unsigned_short
5882 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5883 1, "unsigned short");
5884 objfile_type
->builtin_int
5885 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5887 objfile_type
->builtin_unsigned_int
5888 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5890 objfile_type
->builtin_long
5891 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5893 objfile_type
->builtin_unsigned_long
5894 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5895 1, "unsigned long");
5896 objfile_type
->builtin_long_long
5897 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5899 objfile_type
->builtin_unsigned_long_long
5900 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5901 1, "unsigned long long");
5902 objfile_type
->builtin_float
5903 = init_float_type (objfile
, gdbarch_float_bit (gdbarch
),
5904 "float", gdbarch_float_format (gdbarch
));
5905 objfile_type
->builtin_double
5906 = init_float_type (objfile
, gdbarch_double_bit (gdbarch
),
5907 "double", gdbarch_double_format (gdbarch
));
5908 objfile_type
->builtin_long_double
5909 = init_float_type (objfile
, gdbarch_long_double_bit (gdbarch
),
5910 "long double", gdbarch_long_double_format (gdbarch
));
5912 /* This type represents a type that was unrecognized in symbol read-in. */
5913 objfile_type
->builtin_error
5914 = init_type (objfile
, TYPE_CODE_ERROR
, 0, "<unknown type>");
5916 /* The following set of types is used for symbols with no
5917 debug information. */
5918 objfile_type
->nodebug_text_symbol
5919 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5920 "<text variable, no debug info>");
5921 objfile_type
->nodebug_text_gnu_ifunc_symbol
5922 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5923 "<text gnu-indirect-function variable, no debug info>");
5924 TYPE_GNU_IFUNC (objfile_type
->nodebug_text_gnu_ifunc_symbol
) = 1;
5925 objfile_type
->nodebug_got_plt_symbol
5926 = init_pointer_type (objfile
, gdbarch_addr_bit (gdbarch
),
5927 "<text from jump slot in .got.plt, no debug info>",
5928 objfile_type
->nodebug_text_symbol
);
5929 objfile_type
->nodebug_data_symbol
5930 = init_nodebug_var_type (objfile
, "<data variable, no debug info>");
5931 objfile_type
->nodebug_unknown_symbol
5932 = init_nodebug_var_type (objfile
, "<variable (not text or data), no debug info>");
5933 objfile_type
->nodebug_tls_symbol
5934 = init_nodebug_var_type (objfile
, "<thread local variable, no debug info>");
5936 /* NOTE: on some targets, addresses and pointers are not necessarily
5940 - gdb's `struct type' always describes the target's
5942 - gdb's `struct value' objects should always hold values in
5944 - gdb's CORE_ADDR values are addresses in the unified virtual
5945 address space that the assembler and linker work with. Thus,
5946 since target_read_memory takes a CORE_ADDR as an argument, it
5947 can access any memory on the target, even if the processor has
5948 separate code and data address spaces.
5950 In this context, objfile_type->builtin_core_addr is a bit odd:
5951 it's a target type for a value the target will never see. It's
5952 only used to hold the values of (typeless) linker symbols, which
5953 are indeed in the unified virtual address space. */
5955 objfile_type
->builtin_core_addr
5956 = init_integer_type (objfile
, gdbarch_addr_bit (gdbarch
), 1,
5959 objfile_type_data
.set (objfile
, objfile_type
);
5960 return objfile_type
;
5963 void _initialize_gdbtypes ();
5965 _initialize_gdbtypes ()
5967 gdbtypes_data
= gdbarch_data_register_post_init (gdbtypes_post_init
);
5969 add_setshow_zuinteger_cmd ("overload", no_class
, &overload_debug
,
5970 _("Set debugging of C++ overloading."),
5971 _("Show debugging of C++ overloading."),
5972 _("When enabled, ranking of the "
5973 "functions is displayed."),
5975 show_overload_debug
,
5976 &setdebuglist
, &showdebuglist
);
5978 /* Add user knob for controlling resolution of opaque types. */
5979 add_setshow_boolean_cmd ("opaque-type-resolution", class_support
,
5980 &opaque_type_resolution
,
5981 _("Set resolution of opaque struct/class/union"
5982 " types (if set before loading symbols)."),
5983 _("Show resolution of opaque struct/class/union"
5984 " types (if set before loading symbols)."),
5986 show_opaque_type_resolution
,
5987 &setlist
, &showlist
);
5989 /* Add an option to permit non-strict type checking. */
5990 add_setshow_boolean_cmd ("type", class_support
,
5991 &strict_type_checking
,
5992 _("Set strict type checking."),
5993 _("Show strict type checking."),
5995 show_strict_type_checking
,
5996 &setchecklist
, &showchecklist
);